diff --git a/app/src/main/java/com/simplemobiletools/calendar/Utils.java b/app/src/main/java/com/simplemobiletools/calendar/Utils.java
deleted file mode 100644
index 7e5fb71fd..000000000
--- a/app/src/main/java/com/simplemobiletools/calendar/Utils.java
+++ /dev/null
@@ -1,85 +0,0 @@
-package com.simplemobiletools.calendar;
-
-import android.app.AlarmManager;
-import android.app.PendingIntent;
-import android.content.Context;
-import android.content.Intent;
-import android.graphics.Color;
-import android.os.SystemClock;
-import android.widget.Toast;
-
-import com.simplemobiletools.calendar.helpers.Formatter;
-import com.simplemobiletools.calendar.models.Event;
-import com.simplemobiletools.calendar.receivers.NotificationReceiver;
-
-import org.joda.time.DateTime;
-
-public class Utils {
-
-    public static int adjustAlpha(int color, float factor) {
-        final int alpha = Math.round(Color.alpha(color) * factor);
-        final int red = Color.red(color);
-        final int green = Color.green(color);
-        final int blue = Color.blue(color);
-        return Color.argb(alpha, red, green, blue);
-    }
-
-    public static void showToast(Context context, int resId) {
-        Toast.makeText(context, context.getResources().getString(resId), Toast.LENGTH_SHORT).show();
-    }
-
-    public static void scheduleNextEvent(Context context, Event event) {
-        int startTS = event.getStartTS() - event.getReminderMinutes() * 60;
-        int newTS = startTS;
-        if (event.getRepeatInterval() == Constants.DAY || event.getRepeatInterval() == Constants.WEEK || event.getRepeatInterval() == Constants.BIWEEK) {
-            while (startTS < System.currentTimeMillis() / 1000 + 5) {
-                startTS += event.getRepeatInterval();
-            }
-            newTS = startTS;
-        } else if (event.getRepeatInterval() == Constants.MONTH) {
-            newTS = getNewTS(startTS, true);
-        } else if (event.getRepeatInterval() == Constants.YEAR) {
-            newTS = getNewTS(startTS, false);
-        }
-
-        if (newTS != 0)
-            Utils.scheduleEventIn(context, newTS, event);
-    }
-
-    private static int getNewTS(int ts, boolean isMonthly) {
-        DateTime dateTime = Formatter.INSTANCE.getDateTimeFromTS(ts);
-        while (dateTime.isBeforeNow()) {
-            dateTime = isMonthly ? dateTime.plusMonths(1) : dateTime.plusYears(1);
-        }
-        return (int) (dateTime.getMillis() / 1000);
-    }
-
-    public static void scheduleNotification(Context context, Event event) {
-        if (event.getReminderMinutes() == -1)
-            return;
-
-        scheduleNextEvent(context, event);
-    }
-
-    private static void scheduleEventIn(Context context, int notifTS, Event event) {
-        final long delayFromNow = (long) notifTS * 1000 - System.currentTimeMillis();
-        if (delayFromNow < 0)
-            return;
-
-        final long notifInMs = SystemClock.elapsedRealtime() + delayFromNow;
-        final PendingIntent pendingIntent = getNotificationIntent(context, event.getId());
-        final AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
-        alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, notifInMs, pendingIntent);
-    }
-
-    private static PendingIntent getNotificationIntent(Context context, int eventId) {
-        final Intent intent = new Intent(context, NotificationReceiver.class);
-        intent.putExtra(NotificationReceiver.Companion.getEVENT_ID(), eventId);
-        return PendingIntent.getBroadcast(context, eventId, intent, PendingIntent.FLAG_UPDATE_CURRENT);
-    }
-
-    public static int[] getLetterIDs() {
-        return new int[]{R.string.sunday_letter, R.string.monday_letter, R.string.tuesday_letter, R.string.wednesday_letter,
-                R.string.thursday_letter, R.string.friday_letter, R.string.saturday_letter};
-    }
-}
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/MonthlyCalendarImpl.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/MonthlyCalendarImpl.kt
index 20a37e14b..13c8eec78 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/MonthlyCalendarImpl.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/MonthlyCalendarImpl.kt
@@ -98,11 +98,7 @@ class MonthlyCalendarImpl(val mCallback: MonthlyCalendar, val mContext: Context)
             }
         }
 
-        for (day in days) {
-            if (eventCodes.contains(day.code)) {
-                day.hasEvent = true
-            }
-        }
+        days.filter { eventCodes.contains(it.code) }.forEach { it.hasEvent = true }
     }
 
     private fun isToday(targetDate: DateTime, curDayInMonth: Int): Boolean {
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/DayActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/DayActivity.kt
index 68c6197cd..9def7a105 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/DayActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/DayActivity.kt
@@ -7,10 +7,10 @@ import android.support.design.widget.Snackbar
 import android.support.v4.view.ViewPager
 import android.view.View
 import com.simplemobiletools.calendar.Constants
-import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.R
 import com.simplemobiletools.calendar.adapters.MyDayPagerAdapter
 import com.simplemobiletools.calendar.fragments.DayFragment
+import com.simplemobiletools.calendar.helpers.Formatter
 import kotlinx.android.synthetic.main.activity_day.*
 import org.joda.time.DateTime
 import java.util.*
@@ -119,8 +119,10 @@ class DayActivity : SimpleActivity(), DayFragment.DeleteListener, ViewPager.OnPa
     override fun notifyDeletion(cnt: Int) {
         val msg = resources.getQuantityString(R.plurals.events_deleted, cnt, cnt)
         mSnackbar = Snackbar.make(day_coordinator, msg, Snackbar.LENGTH_INDEFINITE)
-        mSnackbar!!.setAction(resources.getString(R.string.undo), undoDeletion)
-        mSnackbar!!.setActionTextColor(Color.WHITE)
-        mSnackbar!!.show()
+        mSnackbar!!.apply {
+            setAction(resources.getString(R.string.undo), undoDeletion)
+            setActionTextColor(Color.WHITE)
+            show()
+        }
     }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt
index 110846fae..802ac56c6 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt
@@ -9,7 +9,8 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.widget.AdapterView
-import com.simplemobiletools.calendar.*
+import com.simplemobiletools.calendar.Constants
+import com.simplemobiletools.calendar.R
 import com.simplemobiletools.calendar.extensions.*
 import com.simplemobiletools.calendar.fragments.DayFragment
 import com.simplemobiletools.calendar.helpers.DBHelper
@@ -217,16 +218,17 @@ class EventActivity : SimpleActivity(), DBHelper.EventsListener {
     }
 
     private fun deleteEvent() {
-        val intent = Intent()
-        intent.putExtra(DayFragment.DELETED_ID, mEvent.id)
-        setResult(Activity.RESULT_OK, intent)
+        Intent().apply {
+            putExtra(DayFragment.DELETED_ID, mEvent.id)
+            setResult(Activity.RESULT_OK, this)
+        }
         finish()
     }
 
     private fun saveEvent() {
         val newTitle = event_title.value
         if (newTitle.isEmpty()) {
-            Utils.showToast(applicationContext, R.string.title_empty)
+            toast(R.string.title_empty)
             event_title.requestFocus()
             return
         }
@@ -235,7 +237,7 @@ class EventActivity : SimpleActivity(), DBHelper.EventsListener {
         val newEndTS = (mEventEndDateTime.millis / 1000).toInt()
 
         if (event_end_checkbox.isChecked && newStartTS > newEndTS) {
-            Utils.showToast(applicationContext, R.string.end_before_start)
+            toast(R.string.end_before_start)
             return
         }
 
@@ -360,18 +362,18 @@ class EventActivity : SimpleActivity(), DBHelper.EventsListener {
 
     override fun eventInserted(event: Event) {
         if (DateTime.now().isAfter(mEventStartDateTime.millis)) {
-            Utils.showToast(applicationContext, R.string.past_event_added)
+            toast(R.string.past_event_added)
         } else {
-            Utils.showToast(applicationContext, R.string.event_added)
+            toast(R.string.event_added)
         }
-        Utils.scheduleNotification(applicationContext, event)
+        scheduleNotification(event)
         updateWidget()
         finish()
     }
 
     override fun eventUpdated(event: Event) {
-        Utils.scheduleNotification(applicationContext, event)
-        Utils.showToast(applicationContext, R.string.event_updated)
+        scheduleNotification(event)
+        toast(R.string.event_updated)
         updateWidget()
         finish()
     }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt
index e38a8b7d2..a13795d68 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/MainActivity.kt
@@ -9,12 +9,12 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import com.simplemobiletools.calendar.Constants
-import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.R
 import com.simplemobiletools.calendar.adapters.MyMonthPagerAdapter
 import com.simplemobiletools.calendar.adapters.MyYearPagerAdapter
 import com.simplemobiletools.calendar.extensions.updateWidget
 import com.simplemobiletools.calendar.fragments.EventListFragment
+import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.views.dialogs.ChangeViewDialog
 import kotlinx.android.synthetic.main.activity_main.*
 import org.joda.time.DateTime
@@ -222,14 +222,16 @@ class MainActivity : SimpleActivity(), EventListFragment.DeleteListener, ChangeV
     override fun notifyDeletion(cnt: Int) {
         val msg = resources.getQuantityString(R.plurals.events_deleted, cnt, cnt)
         mSnackbar = Snackbar.make(calendar_coordinator, msg, Snackbar.LENGTH_LONG)
-        mSnackbar!!.setCallback(object: Snackbar.Callback() {
-            override fun onDismissed(snackbar: Snackbar?, event: Int) {
-                super.onDismissed(snackbar, event)
-                mEventListFragment?.deleteEvents()
-            }
-        })
-        mSnackbar!!.setAction(resources.getString(R.string.undo), undoDeletion)
-        mSnackbar!!.setActionTextColor(Color.WHITE)
-        mSnackbar!!.show()
+        mSnackbar!!.apply {
+            setCallback(object : Snackbar.Callback() {
+                override fun onDismissed(snackbar: Snackbar?, event: Int) {
+                    super.onDismissed(snackbar, event)
+                    mEventListFragment?.deleteEvents()
+                }
+            })
+            setAction(resources.getString(R.string.undo), undoDeletion)
+            setActionTextColor(Color.WHITE)
+            show()
+        }
     }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SimpleActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SimpleActivity.kt
index eecf61a1f..9d76c0bbe 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SimpleActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SimpleActivity.kt
@@ -3,8 +3,8 @@ package com.simplemobiletools.calendar.activities
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
 import android.view.MenuItem
-import com.simplemobiletools.calendar.helpers.Config
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.helpers.Config
 
 open class SimpleActivity : AppCompatActivity() {
     lateinit var mConfig: Config
@@ -16,12 +16,12 @@ open class SimpleActivity : AppCompatActivity() {
     }
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
-        when (item.itemId) {
+        return when (item.itemId) {
             android.R.id.home -> {
                 finish()
-                return true
+                true
             }
-            else -> return super.onOptionsItemSelected(item)
+            else -> super.onOptionsItemSelected(item)
         }
     }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetConfigureActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetConfigureActivity.kt
index 1ecc57b74..f21d450c2 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetConfigureActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetConfigureActivity.kt
@@ -15,9 +15,9 @@ import android.widget.TextView
 import com.simplemobiletools.calendar.Constants
 import com.simplemobiletools.calendar.MonthlyCalendarImpl
 import com.simplemobiletools.calendar.R
-import com.simplemobiletools.calendar.Utils
 import com.simplemobiletools.calendar.helpers.Config
 import com.simplemobiletools.calendar.helpers.MyWidgetProvider
+import com.simplemobiletools.calendar.helpers.Utils
 import com.simplemobiletools.calendar.interfaces.MonthlyCalendar
 import com.simplemobiletools.calendar.models.Day
 import kotlinx.android.synthetic.main.first_row.*
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventsAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventsAdapter.kt
index 434920cce..f5c13ef9b 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventsAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/EventsAdapter.kt
@@ -5,8 +5,8 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.BaseAdapter
-import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.models.Event
 import kotlinx.android.synthetic.main.event_item.view.*
 
@@ -45,17 +45,11 @@ class EventsAdapter(context: Context, private val mEvents: List<Event>) : BaseAd
         return view
     }
 
-    override fun getCount(): Int {
-        return mEvents.size
-    }
+    override fun getCount() = mEvents.size
 
-    override fun getItem(position: Int): Any {
-        return mEvents[position]
-    }
+    override fun getItem(position: Int) = mEvents[position]
 
-    override fun getItemId(position: Int): Long {
-        return 0
-    }
+    override fun getItemId(position: Int) = 0L
 
     class ViewHolder(view: View) {
         val title = view.event_item_title
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyDayPagerAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyDayPagerAdapter.kt
index 404a55060..d680cf815 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyDayPagerAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyDayPagerAdapter.kt
@@ -16,9 +16,7 @@ class MyDayPagerAdapter(fm: FragmentManager, private val mCodes: List<String>, p
         fragments = SparseArray(10)
     }
 
-    override fun getCount(): Int {
-        return mCodes.size
-    }
+    override fun getCount() = mCodes.size
 
     override fun getItem(position: Int): Fragment {
         val bundle = Bundle()
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyYearPagerAdapter.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyYearPagerAdapter.kt
index 350878e73..87d45675f 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyYearPagerAdapter.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/adapters/MyYearPagerAdapter.kt
@@ -5,14 +5,12 @@ import android.support.v4.app.Fragment
 import android.support.v4.app.FragmentManager
 import android.support.v4.app.FragmentStatePagerAdapter
 import com.simplemobiletools.calendar.Constants
-import com.simplemobiletools.calendar.interfaces.NavigationListener
 import com.simplemobiletools.calendar.fragments.YearFragment
+import com.simplemobiletools.calendar.interfaces.NavigationListener
 
 class MyYearPagerAdapter(fm: FragmentManager, private val mYears: List<Int>, private val mListener: NavigationListener) : FragmentStatePagerAdapter(fm) {
 
-    override fun getCount(): Int {
-        return mYears.size
-    }
+    override fun getCount() = mYears.size
 
     override fun getItem(position: Int): Fragment {
         val bundle = Bundle()
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
index 396dcaaeb..15e204fc3 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt
@@ -1,16 +1,23 @@
 package com.simplemobiletools.calendar.extensions
 
+import android.app.AlarmManager
+import android.app.PendingIntent
 import android.appwidget.AppWidgetManager
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
+import android.os.SystemClock
 import android.widget.Toast
-import com.simplemobiletools.calendar.helpers.MyWidgetProvider
+import com.simplemobiletools.calendar.Constants
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.helpers.Formatter
+import com.simplemobiletools.calendar.helpers.MyWidgetProvider
+import com.simplemobiletools.calendar.models.Event
+import com.simplemobiletools.calendar.receivers.NotificationReceiver
 
 fun Context.updateWidget() {
     val widgetsCnt = AppWidgetManager.getInstance(this).getAppWidgetIds(ComponentName(this, MyWidgetProvider::class.java))
-    if (widgetsCnt.size == 0)
+    if (widgetsCnt.isEmpty())
         return
 
     val intent = Intent(this, MyWidgetProvider::class.java)
@@ -22,4 +29,53 @@ fun Context.updateWidget() {
 
 fun Context.toast(id: Int) = Toast.makeText(this, resources.getString(id), Toast.LENGTH_SHORT).show()
 
-fun Context.toast(message: String) = Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
+fun Context.scheduleNextEvent(event: Event) {
+    var startTS = event.startTS - event.reminderMinutes * 60
+    var newTS = startTS
+    if (event.repeatInterval == Constants.DAY || event.repeatInterval == Constants.WEEK || event.repeatInterval == Constants.BIWEEK) {
+        while (startTS < System.currentTimeMillis() / 1000 + 5) {
+            startTS += event.repeatInterval
+        }
+        newTS = startTS
+    } else if (event.repeatInterval == Constants.MONTH) {
+        newTS = getNewTS(startTS, true)
+    } else if (event.repeatInterval == Constants.YEAR) {
+        newTS = getNewTS(startTS, false)
+    }
+
+    if (newTS != 0)
+        scheduleEventIn(newTS, event)
+}
+
+private fun getNewTS(ts: Int, isMonthly: Boolean): Int {
+    var dateTime = Formatter.getDateTimeFromTS(ts)
+    while (dateTime.isBeforeNow) {
+        dateTime = if (isMonthly) dateTime.plusMonths(1) else dateTime.plusYears(1)
+    }
+    return (dateTime.millis / 1000).toInt()
+}
+
+
+fun Context.scheduleNotification(event: Event) {
+    if (event.reminderMinutes == -1)
+        return
+
+    scheduleNextEvent(event)
+}
+
+fun Context.scheduleEventIn(notifTS: Int, event: Event) {
+    val delayFromNow = notifTS.toLong() * 1000 - System.currentTimeMillis()
+    if (delayFromNow < 0)
+        return
+
+    val notifInMs = SystemClock.elapsedRealtime() + delayFromNow
+    val pendingIntent = getNotificationIntent(this, event.id)
+    val alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
+    alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, notifInMs, pendingIntent)
+}
+
+private fun getNotificationIntent(context: Context, eventId: Int): PendingIntent {
+    val intent = Intent(context, NotificationReceiver::class.java)
+    intent.putExtra(NotificationReceiver.EVENT_ID, eventId)
+    return PendingIntent.getBroadcast(context, eventId, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+}
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/EditText.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/EditText.kt
index 4ddc19f12..b2f7b51ca 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/EditText.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/extensions/EditText.kt
@@ -2,4 +2,4 @@ package com.simplemobiletools.calendar.extensions
 
 import android.widget.EditText
 
-val EditText.value: String get() = this.text.toString().trim()
+val EditText.value: String get() = text.toString().trim()
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt
index 327f34c15..375e9d071 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/DayFragment.kt
@@ -20,6 +20,7 @@ import com.simplemobiletools.calendar.adapters.EventsAdapter
 import com.simplemobiletools.calendar.extensions.updateWidget
 import com.simplemobiletools.calendar.helpers.Config
 import com.simplemobiletools.calendar.helpers.DBHelper
+import com.simplemobiletools.calendar.helpers.Utils
 import com.simplemobiletools.calendar.interfaces.NavigationListener
 import com.simplemobiletools.calendar.models.Event
 import kotlinx.android.synthetic.main.day_fragment.view.*
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt
index 9fa320b3c..074e88a09 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/MonthFragment.kt
@@ -16,6 +16,7 @@ import com.simplemobiletools.calendar.activities.DayActivity
 import com.simplemobiletools.calendar.extensions.beVisibleIf
 import com.simplemobiletools.calendar.helpers.Config
 import com.simplemobiletools.calendar.helpers.Formatter
+import com.simplemobiletools.calendar.helpers.Utils
 import com.simplemobiletools.calendar.interfaces.MonthlyCalendar
 import com.simplemobiletools.calendar.interfaces.NavigationListener
 import com.simplemobiletools.calendar.models.Day
@@ -149,7 +150,7 @@ class MonthFragment : Fragment(), MonthlyCalendar {
     }
 
     private fun setupLabels() {
-        val letters = Utils.getLetterIDs()
+        val letters = Utils.letterIDs
 
         for (i in 0..6) {
             val dayTV = mHolder.findViewById(mRes.getIdentifier("label_" + i, "id", mPackageName)) as TextView
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/YearFragment.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/YearFragment.kt
index 4693cd17a..531f15370 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/YearFragment.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/fragments/YearFragment.kt
@@ -10,6 +10,7 @@ import android.view.ViewGroup
 import android.widget.TextView
 import com.simplemobiletools.calendar.*
 import com.simplemobiletools.calendar.helpers.Config
+import com.simplemobiletools.calendar.helpers.Utils
 import com.simplemobiletools.calendar.interfaces.NavigationListener
 import com.simplemobiletools.calendar.interfaces.YearlyCalendar
 import com.simplemobiletools.calendar.views.SmallMonthView
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/MyWidgetProvider.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/MyWidgetProvider.kt
index 5fde21aa0..a7e4291ed 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/MyWidgetProvider.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/MyWidgetProvider.kt
@@ -16,7 +16,7 @@ import android.widget.RemoteViews
 import com.simplemobiletools.calendar.Constants
 import com.simplemobiletools.calendar.MonthlyCalendarImpl
 import com.simplemobiletools.calendar.R
-import com.simplemobiletools.calendar.Utils
+import com.simplemobiletools.calendar.helpers.Utils
 import com.simplemobiletools.calendar.activities.DayActivity
 import com.simplemobiletools.calendar.activities.MainActivity
 import com.simplemobiletools.calendar.interfaces.MonthlyCalendar
@@ -183,7 +183,7 @@ class MyWidgetProvider : AppWidgetProvider(), MonthlyCalendar {
     private fun updateLabelColor() {
         val mSundayFirst = Config.newInstance(mContext).isSundayFirst
         val packageName = mContext.packageName
-        val letters = Utils.getLetterIDs()
+        val letters = Utils.letterIDs
         for (i in 0..6) {
             val id = mRes.getIdentifier("label_" + i, "id", packageName)
             mRemoteViews.setInt(id, "setTextColor", mTextColor)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Utils.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Utils.kt
new file mode 100644
index 000000000..0a005055c
--- /dev/null
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Utils.kt
@@ -0,0 +1,18 @@
+package com.simplemobiletools.calendar.helpers
+
+import android.graphics.Color
+import com.simplemobiletools.calendar.R
+
+object Utils {
+    fun adjustAlpha(color: Int, factor: Float): Int {
+        val alpha = Math.round(Color.alpha(color) * factor)
+        val red = Color.red(color)
+        val green = Color.green(color)
+        val blue = Color.blue(color)
+        return Color.argb(alpha, red, green, blue)
+    }
+
+    val letterIDs: IntArray
+        get() = intArrayOf(R.string.sunday_letter, R.string.monday_letter, R.string.tuesday_letter, R.string.wednesday_letter,
+                R.string.thursday_letter, R.string.friday_letter, R.string.saturday_letter)
+}
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/BootCompletedReceiver.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/BootCompletedReceiver.kt
index df46950ba..d5cc1ca17 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/BootCompletedReceiver.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/BootCompletedReceiver.kt
@@ -3,15 +3,15 @@ package com.simplemobiletools.calendar.receivers
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
+import com.simplemobiletools.calendar.extensions.scheduleNextEvent
 import com.simplemobiletools.calendar.helpers.DBHelper
-import com.simplemobiletools.calendar.Utils
 
 class BootCompletedReceiver : BroadcastReceiver() {
 
     override fun onReceive(context: Context, arg1: Intent) {
         val events = DBHelper(context).getEventsAtReboot()
         for (event in events) {
-            Utils.scheduleNextEvent(context, event)
+            context.scheduleNextEvent(event)
         }
     }
 }
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/NotificationReceiver.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/NotificationReceiver.kt
index d998026df..d538fb2db 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/NotificationReceiver.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/receivers/NotificationReceiver.kt
@@ -9,8 +9,8 @@ import android.content.Intent
 import android.media.RingtoneManager
 import com.simplemobiletools.calendar.Constants
 import com.simplemobiletools.calendar.R
-import com.simplemobiletools.calendar.Utils
 import com.simplemobiletools.calendar.activities.EventActivity
+import com.simplemobiletools.calendar.extensions.scheduleNextEvent
 import com.simplemobiletools.calendar.helpers.DBHelper
 import com.simplemobiletools.calendar.helpers.Formatter
 import com.simplemobiletools.calendar.models.Event
@@ -38,12 +38,10 @@ class NotificationReceiver : BroadcastReceiver() {
         notificationManager.notify(id, notification)
 
         if (event.repeatInterval != 0)
-            Utils.scheduleNextEvent(context, event)
+            context.scheduleNextEvent(event)
     }
 
-    private fun getEventTime(startTime: String, endTime: String): String {
-        return if (startTime == endTime) startTime else startTime + " - " + endTime
-    }
+    private fun getEventTime(startTime: String, endTime: String) = if (startTime == endTime) startTime else startTime + " - " + endTime
 
     private fun getPendingIntent(context: Context, event: Event): PendingIntent {
         val intent = Intent(context, EventActivity::class.java)
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/views/SmallMonthView.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/views/SmallMonthView.kt
index 1b6997657..7849067e2 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/views/SmallMonthView.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/views/SmallMonthView.kt
@@ -9,7 +9,7 @@ import android.view.View
 import com.simplemobiletools.calendar.helpers.Config
 import com.simplemobiletools.calendar.Constants
 import com.simplemobiletools.calendar.R
-import com.simplemobiletools.calendar.Utils
+import com.simplemobiletools.calendar.helpers.Utils
 import java.util.*
 
 class SmallMonthView(context: Context, attrs: AttributeSet, defStyle: Int) : View(context, attrs, defStyle) {