diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 9762e9bbf..3920aeb0e 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -6,6 +6,7 @@ plugins {
     alias(libs.plugins.android)
     alias(libs.plugins.kotlinAndroid)
     alias(libs.plugins.ksp)
+    alias(libs.plugins.parcelize)
     base
 }
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/EventActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/EventActivity.kt
index 917e8d556..bc6f9cfb2 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/EventActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/EventActivity.kt
@@ -24,8 +24,6 @@ import android.widget.RelativeLayout
 import com.google.android.material.timepicker.MaterialTimePicker
 import com.google.android.material.timepicker.MaterialTimePicker.INPUT_MODE_CLOCK
 import com.google.android.material.timepicker.TimeFormat
-import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
 import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.adapters.AutoCompleteTextViewAdapter
 import com.simplemobiletools.calendar.pro.databinding.ActivityEventBinding
@@ -171,7 +169,7 @@ class EventActivity : SimpleActivity() {
             putInt(REPEAT_RULE, mRepeatRule)
             putLong(REPEAT_LIMIT, mRepeatLimit)
 
-            putString(ATTENDEES, getAllAttendees(false))
+            putParcelableArrayList(ATTENDEES, getAllAttendees(false))
 
             putInt(AVAILABILITY, mAvailability)
             putInt(EVENT_COLOR, mEventColor)
@@ -213,8 +211,7 @@ class EventActivity : SimpleActivity() {
             mRepeatRule = getInt(REPEAT_RULE)
             mRepeatLimit = getLong(REPEAT_LIMIT)
 
-            val token = object : TypeToken<List<Attendee>>() {}.type
-            mAttendees = Gson().fromJson<ArrayList<Attendee>>(getString(ATTENDEES), token) ?: ArrayList()
+            mAttendees = getParcelableArrayList(ATTENDEES) ?: arrayListOf()
 
             mEventTypeId = getLong(EVENT_TYPE_ID)
             mEventCalendarId = getInt(EVENT_CALENDAR_ID)
@@ -507,8 +504,7 @@ class EventActivity : SimpleActivity() {
         mAvailability = mEvent.availability
         mEventColor = mEvent.color
 
-        val token = object : TypeToken<List<Attendee>>() {}.type
-        mAttendees = Gson().fromJson<ArrayList<Attendee>>(mEvent.attendees, token) ?: ArrayList()
+        mAttendees = mEvent.attendees.toMutableList() as ArrayList<Attendee>
 
         checkRepeatTexts(mRepeatInterval)
         checkAttendees()
@@ -1310,7 +1306,7 @@ class EventActivity : SimpleActivity() {
             flags = mEvent.flags.addBitIf(binding.eventAllDay.isChecked, FLAG_ALL_DAY)
             repeatLimit = if (repeatInterval == 0) 0 else mRepeatLimit
             repeatRule = mRepeatRule
-            attendees = if (mEventCalendarId == STORED_LOCALLY_ONLY) "" else getAllAttendees(true)
+            attendees = if (mEventCalendarId == STORED_LOCALLY_ONLY) emptyList() else getAllAttendees(true)
             eventType = newEventType
             lastUpdated = System.currentTimeMillis()
             source = newSource
@@ -1641,7 +1637,7 @@ class EventActivity : SimpleActivity() {
     private fun updateAttendees() {
         val currentCalendar = calDAVHelper.getCalDAVCalendars("", true).firstOrNull { it.id == mEventCalendarId }
         mAttendees.forEach {
-            it.isMe = it.email == currentCalendar?.accountName
+            it.isMe = it.email == currentCalendar?.ownerName
         }
 
         mAttendees.sortWith(compareBy<Attendee>
@@ -1729,7 +1725,7 @@ class EventActivity : SimpleActivity() {
         autoCompleteView.focusSearch(View.FOCUS_DOWN)?.requestFocus()
 
         attendeeHolder.apply {
-            root.beVisible()
+            eventContactAttendee.beVisible()
 
             val attendeeStatusBackground = resources.getDrawable(R.drawable.attendee_status_circular_background)
             (attendeeStatusBackground as LayerDrawable).findDrawableByLayerId(R.id.attendee_status_circular_background)
@@ -1817,7 +1813,7 @@ class EventActivity : SimpleActivity() {
         }
     }
 
-    private fun getAllAttendees(isSavingEvent: Boolean): String {
+    private fun getAllAttendees(isSavingEvent: Boolean): ArrayList<Attendee> {
         var attendees = ArrayList<Attendee>()
         mSelectedContacts.forEach {
             attendees.add(it)
@@ -1831,15 +1827,15 @@ class EventActivity : SimpleActivity() {
 
         if (mEvent.id == null && isSavingEvent && attendees.isNotEmpty()) {
             val currentCalendar = calDAVHelper.getCalDAVCalendars("", true).firstOrNull { it.id == mEventCalendarId }
-            mAvailableContacts.firstOrNull { it.email == currentCalendar?.accountName }?.apply {
-                attendees = attendees.filter { it.email != currentCalendar?.accountName }.toMutableList() as ArrayList<Attendee>
+            mAvailableContacts.firstOrNull { it.email == currentCalendar?.ownerName }?.apply {
+                attendees = attendees.filter { it.email != currentCalendar?.ownerName }.toMutableList() as ArrayList<Attendee>
                 status = Attendees.ATTENDEE_STATUS_ACCEPTED
                 relationship = Attendees.RELATIONSHIP_ORGANIZER
                 attendees.add(this)
             }
         }
 
-        return Gson().toJson(attendees)
+        return attendees
     }
 
     private fun getNames(): List<Attendee> {
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/WidgetListConfigureActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/WidgetListConfigureActivity.kt
index e15266f88..f5bcd57b1 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/WidgetListConfigureActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/activities/WidgetListConfigureActivity.kt
@@ -232,36 +232,24 @@ class WidgetListConfigureActivity : SimpleActivity() {
 
         var time = dateTime.withHourOfDay(7)
         listItems.add(
-            ListEvent(
-                1,
-                time.seconds(),
-                time.plusMinutes(30).seconds(),
-                getString(R.string.sample_title_1),
-                getString(R.string.sample_description_1),
-                false,
-                getProperPrimaryColor(),
-                "",
-                false,
-                false,
-                false,
-                false
+            ListEvent.empty.copy(
+                id = 1,
+                startTS = time.seconds(),
+                endTS = time.plusMinutes(30).seconds(),
+                title = getString(R.string.sample_title_1),
+                description = getString(R.string.sample_description_1),
+                color = getProperPrimaryColor(),
             )
         )
         time = dateTime.withHourOfDay(8)
         listItems.add(
-            ListEvent(
-                2,
-                time.seconds(),
-                time.plusHours(1).seconds(),
-                getString(R.string.sample_title_2),
-                getString(R.string.sample_description_2),
-                false,
-                getProperPrimaryColor(),
-                "",
-                false,
-                false,
-                false,
-                false
+            ListEvent.empty.copy(
+                id = 2,
+                startTS = time.seconds(),
+                endTS = time.plusHours(1).seconds(),
+                title = getString(R.string.sample_title_2),
+                description = getString(R.string.sample_description_2),
+                color = getProperPrimaryColor(),
             )
         )
 
@@ -272,53 +260,35 @@ class WidgetListConfigureActivity : SimpleActivity() {
 
         time = dateTime.withHourOfDay(8)
         listItems.add(
-            ListEvent(
-                3,
-                time.seconds(),
-                time.plusHours(1).seconds(),
-                getString(R.string.sample_title_3),
-                "",
-                false,
-                getProperPrimaryColor(),
-                "",
-                false,
-                false,
-                false,
-                false
+            ListEvent.empty.copy(
+                id = 3,
+                startTS = time.seconds(),
+                endTS = time.plusHours(1).seconds(),
+                title = getString(R.string.sample_title_3),
+                description = "",
+                color = getProperPrimaryColor(),
             )
         )
         time = dateTime.withHourOfDay(13)
         listItems.add(
-            ListEvent(
-                4,
-                time.seconds(),
-                time.plusHours(1).seconds(),
-                getString(R.string.sample_title_4),
-                getString(R.string.sample_description_4),
-                false,
-                getProperPrimaryColor(),
-                "",
-                false,
-                false,
-                false,
-                false
+            ListEvent.empty.copy(
+                id = 4,
+                startTS = time.seconds(),
+                endTS = time.plusHours(1).seconds(),
+                title = getString(R.string.sample_title_4),
+                description = getString(R.string.sample_description_4),
+                color = getProperPrimaryColor(),
             )
         )
         time = dateTime.withHourOfDay(18)
         listItems.add(
-            ListEvent(
-                5,
-                time.seconds(),
-                time.plusMinutes(10).seconds(),
-                getString(R.string.sample_title_5),
-                "",
-                false,
-                getProperPrimaryColor(),
-                "",
-                false,
-                false,
-                false,
-                false
+            ListEvent.empty.copy(
+                id = 5,
+                startTS = time.seconds(),
+                endTS = time.plusMinutes(10).seconds(),
+                title = getString(R.string.sample_title_5),
+                description = "",
+                color = getProperPrimaryColor(),
             )
         )
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/DayEventsAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/DayEventsAdapter.kt
index b94af644e..a9ce96abf 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/DayEventsAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/DayEventsAdapter.kt
@@ -90,7 +90,7 @@ class DayEventsAdapter(activity: SimpleActivity, val events: ArrayList<Event>, r
             eventItemHolder.isSelected = selectedKeys.contains(event.id?.toInt())
             eventItemHolder.background.applyColorFilter(textColor)
             eventItemTitle.text = event.title
-            eventItemTitle.checkViewStrikeThrough(event.isTaskCompleted())
+            eventItemTitle.checkViewStrikeThrough(event.shouldStrikeThrough())
             eventItemTime.text = if (event.getIsAllDay()) allDayString else Formatter.getTimeFromTS(activity, event.startTS)
             if (event.startTS != event.endTS) {
                 val startDayCode = Formatter.getDayCodeFromTS(event.startTS)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListAdapter.kt
index 33b541a5c..e29ef3301 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListAdapter.kt
@@ -136,7 +136,7 @@ class EventListAdapter(
             eventItemHolder.isSelected = selectedKeys.contains(listEvent.hashCode())
             eventItemHolder.background.applyColorFilter(textColor)
             eventItemTitle.text = listEvent.title
-            eventItemTitle.checkViewStrikeThrough(listEvent.isTaskCompleted)
+            eventItemTitle.checkViewStrikeThrough(listEvent.shouldStrikeThrough())
             eventItemTime.text = if (listEvent.isAllDay) allDayString else Formatter.getTimeFromTS(activity, listEvent.startTS)
             if (listEvent.startTS != listEvent.endTS) {
                 if (!listEvent.isAllDay) {
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListWidgetAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListWidgetAdapter.kt
index d643f3788..daa4a6bc1 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListWidgetAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/adapters/EventListWidgetAdapter.kt
@@ -6,10 +6,7 @@ import android.graphics.Paint
 import android.widget.RemoteViews
 import android.widget.RemoteViewsService
 import com.simplemobiletools.calendar.pro.R
-import com.simplemobiletools.calendar.pro.extensions.config
-import com.simplemobiletools.calendar.pro.extensions.eventsHelper
-import com.simplemobiletools.calendar.pro.extensions.getWidgetFontSize
-import com.simplemobiletools.calendar.pro.extensions.seconds
+import com.simplemobiletools.calendar.pro.extensions.*
 import com.simplemobiletools.calendar.pro.helpers.*
 import com.simplemobiletools.calendar.pro.models.*
 import com.simplemobiletools.commons.extensions.*
@@ -120,7 +117,7 @@ class EventListWidgetAdapter(val context: Context, val intent: Intent) : RemoteV
                 setViewPadding(R.id.event_item_title, normalMargin, 0, smallMargin, 0)
             }
 
-            if (item.isTaskCompleted) {
+            if (item.shouldStrikeThrough()) {
                 setInt(R.id.event_item_title, "setPaintFlags", Paint.ANTI_ALIAS_FLAG or Paint.STRIKE_THRU_TEXT_FLAG)
             } else {
                 setInt(R.id.event_item_title, "setPaintFlags", Paint.ANTI_ALIAS_FLAG)
@@ -226,18 +223,19 @@ class EventListWidgetAdapter(val context: Context, val intent: Intent) : RemoteV
                 }
 
                 val listEvent = ListEvent(
-                    event.id!!,
-                    event.startTS,
-                    event.endTS,
-                    event.title,
-                    event.description,
-                    event.getIsAllDay(),
-                    event.color,
-                    event.location,
-                    event.isPastEvent,
-                    event.repeatInterval > 0,
-                    event.isTask(),
-                    event.isTaskCompleted()
+                    id = event.id!!,
+                    startTS = event.startTS,
+                    endTS = event.endTS,
+                    title = event.title,
+                    description = event.description,
+                    isAllDay = event.getIsAllDay(),
+                    color = event.color,
+                    location = event.location,
+                    isPastEvent = event.isPastEvent,
+                    isRepeatable = event.repeatInterval > 0,
+                    isTask = event.isTask(),
+                    isTaskCompleted = event.isTaskCompleted(),
+                    isAttendeeInviteDeclined = event.isAttendeeInviteDeclined()
                 )
                 listItems.add(listEvent)
             }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Context.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Context.kt
index ad40259a6..1b69ca2ca 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Context.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Context.kt
@@ -601,7 +601,7 @@ fun Context.addDayEvents(day: DayMonthly, linearLayout: LinearLayout, res: Resou
             dayMonthlyEventId.apply {
                 setTextColor(textColor)
                 text = it.title.replace(" ", "\u00A0")  // allow word break by char
-                checkViewStrikeThrough(it.isTaskCompleted())
+                checkViewStrikeThrough(it.shouldStrikeThrough())
                 contentDescription = it.title
             }
 
@@ -669,7 +669,8 @@ fun Context.getEventListItems(events: List<Event>, addSectionDays: Boolean = tru
                 it.isPastEvent,
                 it.repeatInterval > 0,
                 it.isTask(),
-                it.isTaskCompleted()
+                it.isTaskCompleted(),
+                it.isAttendeeInviteDeclined()
             )
         listItems.add(listEvent)
     }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Event.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Event.kt
index de9908b4c..c31d4f872 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Event.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/Event.kt
@@ -40,3 +40,5 @@ fun Event.maybeAdjustRepeatLimitCount(original: Event, occurrenceTS: Long) {
         this.repeatLimit = newRepeatLimit
     }
 }
+
+fun Event.shouldStrikeThrough() = isTaskCompleted() || isAttendeeInviteDeclined()
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/ListEvent.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/ListEvent.kt
new file mode 100644
index 000000000..406929d18
--- /dev/null
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/ListEvent.kt
@@ -0,0 +1,5 @@
+package com.simplemobiletools.calendar.pro.extensions
+
+import com.simplemobiletools.calendar.pro.models.ListEvent
+
+fun ListEvent.shouldStrikeThrough() = isTaskCompleted || isAttendeeInviteDeclined
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/MonthViewEvent.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/MonthViewEvent.kt
new file mode 100644
index 000000000..440cd66aa
--- /dev/null
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/MonthViewEvent.kt
@@ -0,0 +1,5 @@
+package com.simplemobiletools.calendar.pro.extensions
+
+import com.simplemobiletools.calendar.pro.models.MonthViewEvent
+
+fun MonthViewEvent.shouldStrikeThrough() = isTaskCompleted || isAttendeeInviteDeclined
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/fragments/WeekFragment.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/fragments/WeekFragment.kt
index 9901b212f..691a19798 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/fragments/WeekFragment.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/fragments/WeekFragment.kt
@@ -645,7 +645,7 @@ class WeekFragment : Fragment(), WeeklyCalendar {
                             }
 
                             text = event.title
-                            checkViewStrikeThrough(event.isTaskCompleted())
+                            checkViewStrikeThrough(event.shouldStrikeThrough())
                             contentDescription = text
 
                             minHeight = if (event.startTS == event.endTS) {
@@ -785,7 +785,7 @@ class WeekFragment : Fragment(), WeeklyCalendar {
                 setTextColor(textColor)
                 maxLines = if (event.isTask()) 1 else 2
                 text = event.title
-                checkViewStrikeThrough(event.isTaskCompleted())
+                checkViewStrikeThrough(event.shouldStrikeThrough())
                 contentDescription = text
             }
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/CalDAVHelper.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/CalDAVHelper.kt
index a7df25fd7..b5e3a2e87 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/CalDAVHelper.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/CalDAVHelper.kt
@@ -7,8 +7,6 @@ import android.content.Context
 import android.graphics.Color
 import android.provider.CalendarContract.*
 import android.widget.Toast
-import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
 import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.extensions.*
 import com.simplemobiletools.calendar.pro.models.*
@@ -46,7 +44,7 @@ class CalDAVHelper(val context: Context) {
                     }
                 }
 
-                fetchCalDAVCalendarEvents(calendar.id, localEventType.id!!, showToasts)
+                fetchCalDAVCalendarEvents(calendar, localEventType.id!!, showToasts)
             }
 
             if (scheduleNextSync) {
@@ -151,7 +149,9 @@ class CalDAVHelper(val context: Context) {
     }
 
     @SuppressLint("MissingPermission")
-    private fun fetchCalDAVCalendarEvents(calendarId: Int, eventTypeId: Long, showToasts: Boolean) {
+    private fun fetchCalDAVCalendarEvents(calendar: CalDAVCalendar, eventTypeId: Long, showToasts: Boolean) {
+        val calendarId = calendar.id
+
         val importIdsMap = HashMap<String, Event>()
         val fetchedEventIds = ArrayList<String>()
 
@@ -213,7 +213,7 @@ class CalDAVHelper(val context: Context) {
             val originalId = cursor.getStringValue(Events.ORIGINAL_ID)
             val originalInstanceTime = cursor.getLongValue(Events.ORIGINAL_INSTANCE_TIME)
             val reminders = getCalDAVEventReminders(id)
-            val attendees = Gson().toJson(getCalDAVEventAttendees(id))
+            val attendees = getCalDAVEventAttendees(id, calendar)
             val availability = cursor.getIntValue(Events.AVAILABILITY)
             val status = cursor.getIntValue(Events.STATUS)
             val color = cursor.getIntValueOrNull(Events.EVENT_COLOR)
@@ -394,8 +394,7 @@ class CalDAVHelper(val context: Context) {
 
     private fun setupCalDAVEventAttendees(event: Event) {
         clearEventAttendees(event)
-        val attendees = Gson().fromJson<ArrayList<Attendee>>(event.attendees, object : TypeToken<List<Attendee>>() {}.type) ?: ArrayList()
-        attendees.forEach {
+        event.attendees.forEach {
             val contentValues = ContentValues().apply {
                 put(Attendees.ATTENDEE_NAME, it.name)
                 put(Attendees.ATTENDEE_EMAIL, it.email)
@@ -573,7 +572,7 @@ class CalDAVHelper(val context: Context) {
         return reminders.sortedBy { it.minutes }
     }
 
-    private fun getCalDAVEventAttendees(eventId: Long): List<Attendee> {
+    private fun getCalDAVEventAttendees(eventId: Long, calendar: CalDAVCalendar): List<Attendee> {
         val attendees = ArrayList<Attendee>()
         val uri = Attendees.CONTENT_URI
         val projection = arrayOf(
@@ -588,7 +587,7 @@ class CalDAVHelper(val context: Context) {
             val email = cursor.getStringValue(Attendees.ATTENDEE_EMAIL) ?: ""
             val status = cursor.getIntValue(Attendees.ATTENDEE_STATUS)
             val relationship = cursor.getIntValue(Attendees.ATTENDEE_RELATIONSHIP)
-            val attendee = Attendee(0, name, email, status, "", false, relationship)
+            val attendee = Attendee(0, name, email, status, "", email == calendar.ownerName, relationship)
             attendees.add(attendee)
         }
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt
index 94472f47f..9be7e0eb7 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Converters.kt
@@ -3,10 +3,12 @@ package com.simplemobiletools.calendar.pro.helpers
 import androidx.room.TypeConverter
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
+import com.simplemobiletools.calendar.pro.models.Attendee
 
 class Converters {
     private val gson = Gson()
     private val stringType = object : TypeToken<List<String>>() {}.type
+    private val attendeeType = object : TypeToken<List<Attendee>>() {}.type
 
     @TypeConverter
     fun jsonToStringList(value: String): List<String> {
@@ -25,4 +27,20 @@ class Converters {
 
     @TypeConverter
     fun stringListToJson(list: List<String>) = gson.toJson(list)
+
+    @TypeConverter
+    fun attendeeListToJson(list: List<Attendee>): String = gson.toJson(list)
+
+    @TypeConverter
+    fun jsonToAttendeeList(value: String): List<Attendee> {
+        if (value.isEmpty()) {
+            return emptyList()
+        }
+
+        return try {
+            gson.fromJson<ArrayList<Attendee>>(value, attendeeType) ?: ArrayList()
+        } catch (e: Exception) {
+            emptyList()
+        }
+    }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/IcsImporter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/IcsImporter.kt
index fedc6950c..e119cf0e0 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/IcsImporter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/IcsImporter.kt
@@ -249,7 +249,7 @@ class IcsImporter(val activity: SimpleActivity) {
                             curRepeatRule,
                             curRepeatLimit,
                             curRepeatExceptions,
-                            "",
+                            emptyList(),
                             curImportId,
                             DateTimeZone.getDefault().id,
                             curFlags,
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/MyWidgetMonthlyProvider.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/MyWidgetMonthlyProvider.kt
index b4bca7ec9..fb74792e5 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/MyWidgetMonthlyProvider.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/MyWidgetMonthlyProvider.kt
@@ -12,10 +12,7 @@ import android.view.View
 import android.widget.RemoteViews
 import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.activities.SplashActivity
-import com.simplemobiletools.calendar.pro.extensions.config
-import com.simplemobiletools.calendar.pro.extensions.getWidgetFontSize
-import com.simplemobiletools.calendar.pro.extensions.isWeekendIndex
-import com.simplemobiletools.calendar.pro.extensions.launchNewEventOrTaskActivity
+import com.simplemobiletools.calendar.pro.extensions.*
 import com.simplemobiletools.calendar.pro.interfaces.MonthlyCalendar
 import com.simplemobiletools.calendar.pro.models.DayMonthly
 import com.simplemobiletools.calendar.pro.models.Event
@@ -155,7 +152,7 @@ class MyWidgetMonthlyProvider : AppWidgetProvider() {
                     applyColorFilter(R.id.day_monthly_task_image, eventTextColor)
                     setInt(R.id.day_monthly_event_background, "setColorFilter", it.color)
 
-                    if (it.isTaskCompleted()) {
+                    if (it.shouldStrikeThrough()) {
                         setInt(R.id.day_monthly_event_id, "setPaintFlags", Paint.ANTI_ALIAS_FLAG or Paint.STRIKE_THRU_TEXT_FLAG)
                     } else {
                         setInt(R.id.day_monthly_event_id, "setPaintFlags", Paint.ANTI_ALIAS_FLAG)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Attendee.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Attendee.kt
index 0309fd313..b74d147c5 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Attendee.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Attendee.kt
@@ -2,14 +2,25 @@ package com.simplemobiletools.calendar.pro.models
 
 import android.content.Context
 import android.graphics.drawable.Drawable
+import android.os.Parcelable
 import android.provider.CalendarContract
 import android.widget.ImageView
 import com.bumptech.glide.Glide
 import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
 import com.bumptech.glide.request.RequestOptions
+import kotlinx.parcelize.Parcelize
 
-data class Attendee(val contactId: Int, var name: String, val email: String, var status: Int, var photoUri: String, var isMe: Boolean, var relationship: Int) {
+@Parcelize
+data class Attendee(
+    val contactId: Int,
+    var name: String,
+    val email: String,
+    var status: Int,
+    var photoUri: String,
+    var isMe: Boolean,
+    var relationship: Int
+) : Parcelable {
     fun getPublicName() = name.ifEmpty { email }
 
     fun updateImage(context: Context, imageView: ImageView, placeholder: Drawable) {
@@ -17,21 +28,21 @@ data class Attendee(val contactId: Int, var name: String, val email: String, var
             imageView.setImageDrawable(placeholder)
         } else {
             val options = RequestOptions()
-                    .diskCacheStrategy(DiskCacheStrategy.RESOURCE)
-                    .error(placeholder)
-                    .centerCrop()
+                .diskCacheStrategy(DiskCacheStrategy.RESOURCE)
+                .error(placeholder)
+                .centerCrop()
 
             Glide.with(context)
-                    .load(photoUri)
-                    .transition(DrawableTransitionOptions.withCrossFade())
-                    .placeholder(placeholder)
-                    .apply(options)
-                    .apply(RequestOptions.circleCropTransform())
-                    .into(imageView)
+                .load(photoUri)
+                .transition(DrawableTransitionOptions.withCrossFade())
+                .placeholder(placeholder)
+                .apply(options)
+                .apply(RequestOptions.circleCropTransform())
+                .into(imageView)
         }
     }
 
     fun showStatusImage() = status == CalendarContract.Attendees.ATTENDEE_STATUS_ACCEPTED ||
-            status == CalendarContract.Attendees.ATTENDEE_STATUS_DECLINED ||
-            status == CalendarContract.Attendees.ATTENDEE_STATUS_TENTATIVE
+        status == CalendarContract.Attendees.ATTENDEE_STATUS_DECLINED ||
+        status == CalendarContract.Attendees.ATTENDEE_STATUS_TENTATIVE
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Event.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Event.kt
index c9d225697..315ed828b 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Event.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/Event.kt
@@ -1,5 +1,6 @@
 package com.simplemobiletools.calendar.pro.models
 
+import android.provider.CalendarContract.Attendees
 import androidx.collection.LongSparseArray
 import androidx.room.ColumnInfo
 import androidx.room.Entity
@@ -30,7 +31,7 @@ data class Event(
     @ColumnInfo(name = "repeat_rule") var repeatRule: Int = 0,
     @ColumnInfo(name = "repeat_limit") var repeatLimit: Long = 0L,
     @ColumnInfo(name = "repetition_exceptions") var repetitionExceptions: List<String> = emptyList(),
-    @ColumnInfo(name = "attendees") var attendees: String = "",
+    @ColumnInfo(name = "attendees") var attendees: List<Attendee> = emptyList(),
     @ColumnInfo(name = "import_id") var importId: String = "",
     @ColumnInfo(name = "time_zone") var timeZone: String = "",
     @ColumnInfo(name = "flags") var flags: Int = 0,
@@ -209,4 +210,8 @@ data class Event(
             DateTimeZone.getDefault().id
         }
     }
+
+    fun isAttendeeInviteDeclined() = attendees.any {
+        it.isMe && it.status == Attendees.ATTENDEE_STATUS_DECLINED
+    }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/ListEvent.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/ListEvent.kt
index 512178635..def5ce0ce 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/ListEvent.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/ListEvent.kt
@@ -1,6 +1,36 @@
 package com.simplemobiletools.calendar.pro.models
 
 data class ListEvent(
-    var id: Long, var startTS: Long, var endTS: Long, var title: String, var description: String, var isAllDay: Boolean, var color: Int,
-    var location: String, var isPastEvent: Boolean, var isRepeatable: Boolean, var isTask: Boolean, var isTaskCompleted: Boolean
-) : ListItem()
+    var id: Long,
+    var startTS: Long,
+    var endTS: Long,
+    var title: String,
+    var description: String,
+    var isAllDay: Boolean,
+    var color: Int,
+    var location: String,
+    var isPastEvent: Boolean,
+    var isRepeatable: Boolean,
+    var isTask: Boolean,
+    var isTaskCompleted: Boolean,
+    var isAttendeeInviteDeclined: Boolean
+) : ListItem() {
+
+    companion object {
+        val empty = ListEvent(
+            id = 0,
+            startTS = 0,
+            endTS = 0,
+            title = "",
+            description = "",
+            isAllDay = false,
+            color = 0,
+            location = "",
+            isPastEvent = false,
+            isRepeatable = false,
+            isTask = false,
+            isTaskCompleted = false,
+            isAttendeeInviteDeclined = false
+        )
+    }
+}
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/MonthViewEvent.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/MonthViewEvent.kt
index 5fa8b9ded..1caa8a4cc 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/MonthViewEvent.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/models/MonthViewEvent.kt
@@ -12,5 +12,6 @@ data class MonthViewEvent(
     val isAllDay: Boolean,
     val isPastEvent: Boolean,
     val isTask: Boolean,
-    val isTaskCompleted: Boolean
+    val isTaskCompleted: Boolean,
+    val isAttendeeInviteDeclined: Boolean,
 )
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt
index 6ae6180f4..3c9432024 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/views/MonthView.kt
@@ -130,8 +130,19 @@ class MonthView(context: Context, attrs: AttributeSet, defStyle: Int) : View(con
                     val daysCnt = getEventLastingDaysCount(event)
 
                     val monthViewEvent = MonthViewEvent(
-                        event.id!!, event.title, event.startTS, event.endTS, event.color, dayIndexOnMonthView,
-                        daysCnt, dayIndexOnMonthView, event.getIsAllDay(), event.isPastEvent, event.isTask(), event.isTaskCompleted()
+                        id = event.id!!,
+                        title = event.title,
+                        startTS = event.startTS,
+                        endTS = event.endTS,
+                        color = event.color,
+                        startDayIndex = dayIndexOnMonthView,
+                        daysCnt = daysCnt,
+                        originalStartDayIndex = dayIndexOnMonthView,
+                        isAllDay = event.getIsAllDay(),
+                        isPastEvent = event.isPastEvent,
+                        isTask = event.isTask(),
+                        isTaskCompleted = event.isTaskCompleted(),
+                        isAttendeeInviteDeclined = event.isAttendeeInviteDeclined()
                     )
                     allEvents.add(monthViewEvent)
                 }
@@ -370,7 +381,7 @@ class MonthView(context: Context, attrs: AttributeSet, defStyle: Int) : View(con
 
         val curPaint = Paint(eventTitlePaint)
         curPaint.color = paintColor
-        curPaint.isStrikeThruText = event.isTaskCompleted
+        curPaint.isStrikeThruText = event.shouldStrikeThrough()
         return curPaint
     }
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 287277090..757129902 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -2,6 +2,7 @@ plugins {
     alias(libs.plugins.android).apply(false)
     alias(libs.plugins.kotlinAndroid).apply(false)
     alias(libs.plugins.ksp).apply(false)
+    alias(libs.plugins.parcelize).apply(false)
 }
 
 tasks.register<Delete>("clean") {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 0687192fc..855acea1d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -45,3 +45,5 @@ room = [
 android = { id = "com.android.application", version.ref = "gradlePlugins-agp" }
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
 kotlinAndroid = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+parcelize = { id = "org.jetbrains.kotlin.plugin.parcelize", version.ref = "kotlin" }
+