diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/activities/SettingsActivity.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/activities/SettingsActivity.kt
index 37811085..42422c8f 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/activities/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/activities/SettingsActivity.kt
@@ -36,6 +36,7 @@ class SettingsActivity : SimpleActivity() {
         setupShowContactThumbnails()
         setupShowPhoneNumbers()
         setupStartNameWithSurname()
+        setupUse24HourTimeFormat()
         setupFilterDuplicates()
         setupShowCallConfirmation()
         setupOnContactClick()
@@ -117,6 +118,14 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
+    private fun setupUse24HourTimeFormat() {
+        settings_use_24_hour_time_format.isChecked = config.use24HourFormat
+        settings_use_24_hour_time_format_holder.setOnClickListener {
+            settings_use_24_hour_time_format.toggle()
+            config.use24HourFormat = settings_use_24_hour_time_format.isChecked
+        }
+    }
+
     private fun setupFilterDuplicates() {
         settings_filter_duplicates.isChecked = config.filterDuplicates
         settings_filter_duplicates_holder.setOnClickListener {
diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/helpers/ContactsHelper.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/helpers/ContactsHelper.kt
index f9fb5337..d5fb496a 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/helpers/ContactsHelper.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/helpers/ContactsHelper.kt
@@ -1537,6 +1537,7 @@ class ContactsHelper(val activity: Activity) {
             val todayDate = SimpleDateFormat("dd MMM yyyy", Locale.getDefault()).format(currentDate)
             val yesterdayDate = SimpleDateFormat("dd MMM yyyy", Locale.getDefault()).format(Date(System.currentTimeMillis() - DAY_SECONDS * 1000))
             val yesterday = activity.getString(R.string.yesterday)
+            val timeFormat = if (activity.config.use24HourFormat) "HH:mm" else "h:mm a"
             var prevNumber = ""
 
             var cursor: Cursor? = null
@@ -1552,7 +1553,7 @@ class ContactsHelper(val activity: Activity) {
                             continue
                         }
 
-                        var formattedDate = SimpleDateFormat("dd MMM yyyy, HH:mm", Locale.getDefault()).format(Date(date))
+                        var formattedDate = SimpleDateFormat("dd MMM yyyy, $timeFormat", Locale.getDefault()).format(Date(date))
                         val datePart = formattedDate.substring(0, 11)
                         when {
                             datePart == todayDate -> formattedDate = formattedDate.substring(12)
diff --git a/app/src/main/res/layout/activity_settings.xml b/app/src/main/res/layout/activity_settings.xml
index 8f260f80..39463477 100644
--- a/app/src/main/res/layout/activity_settings.xml
+++ b/app/src/main/res/layout/activity_settings.xml
@@ -18,18 +18,18 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MyTextView
                 android:id="@+id/settings_purchase_thank_you"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_centerVertical="true"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/purchase_simple_thank_you"/>
 
         </RelativeLayout>
@@ -40,18 +40,18 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MyTextView
                 android:id="@+id/settings_customize_colors"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_centerVertical="true"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/customize_colors"/>
 
         </RelativeLayout>
@@ -62,18 +62,18 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MyTextView
                 android:id="@+id/settings_manage_contact_fields"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_centerVertical="true"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/manage_shown_contact_fields"/>
 
         </RelativeLayout>
@@ -84,18 +84,18 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MyTextView
                 android:id="@+id/settings_manage_tabs"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_centerVertical="true"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/manage_shown_tabs"/>
 
         </RelativeLayout>
@@ -106,10 +106,10 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_use_english"
@@ -117,8 +117,8 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/use_english_language"
                 app:switchPadding="@dimen/medium_margin"/>
 
@@ -130,10 +130,10 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_avoid_whats_new"
@@ -141,8 +141,8 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/avoid_whats_new"
                 app:switchPadding="@dimen/medium_margin"/>
 
@@ -154,10 +154,10 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_show_info_bubble"
@@ -165,8 +165,8 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/show_info_bubble"
                 app:switchPadding="@dimen/medium_margin"/>
 
@@ -178,10 +178,10 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_show_contact_thumbnails"
@@ -189,8 +189,8 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/show_contact_thumbnails"
                 app:switchPadding="@dimen/medium_margin"/>
 
@@ -202,10 +202,10 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_show_phone_numbers"
@@ -213,8 +213,8 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/show_phone_numbers"
                 app:switchPadding="@dimen/medium_margin"/>
 
@@ -226,10 +226,10 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_start_with_surname"
@@ -237,23 +237,47 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/start_name_with_surname"
                 app:switchPadding="@dimen/medium_margin"/>
 
         </RelativeLayout>
 
+        <RelativeLayout
+            android:id="@+id/settings_use_24_hour_time_format_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
+            android:paddingRight="@dimen/normal_margin"
+            android:paddingBottom="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MySwitchCompat
+                android:id="@+id/settings_use_24_hour_time_format"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@null"
+                android:clickable="false"
+                android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
+                android:text="@string/use_24_hour_time_format"
+                app:switchPadding="@dimen/medium_margin"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_filter_duplicates_holder"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_filter_duplicates"
@@ -261,8 +285,8 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/filter_duplicates"
                 app:switchPadding="@dimen/medium_margin"/>
 
@@ -274,10 +298,10 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/activity_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin">
+            android:paddingBottom="@dimen/activity_margin">
 
             <com.simplemobiletools.commons.views.MySwitchCompat
                 android:id="@+id/settings_show_call_confirmation"
@@ -285,8 +309,8 @@
                 android:layout_height="wrap_content"
                 android:background="@null"
                 android:clickable="false"
-                android:paddingLeft="@dimen/medium_margin"
                 android:paddingStart="@dimen/medium_margin"
+                android:paddingLeft="@dimen/medium_margin"
                 android:text="@string/show_call_confirmation_dialog"
                 app:switchPadding="@dimen/medium_margin"/>
 
@@ -298,18 +322,18 @@
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/medium_margin"
             android:background="?attr/selectableItemBackground"
-            android:paddingBottom="@dimen/bigger_margin"
             android:paddingLeft="@dimen/normal_margin"
+            android:paddingTop="@dimen/bigger_margin"
             android:paddingRight="@dimen/normal_margin"
-            android:paddingTop="@dimen/bigger_margin">
+            android:paddingBottom="@dimen/bigger_margin">
 
             <com.simplemobiletools.commons.views.MyTextView
                 android:id="@+id/settings_on_contact_click_label"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_centerVertical="true"
-                android:layout_toLeftOf="@+id/settings_on_contact_click"
                 android:layout_toStartOf="@+id/settings_on_contact_click"
+                android:layout_toLeftOf="@+id/settings_on_contact_click"
                 android:paddingLeft="@dimen/medium_margin"
                 android:paddingRight="@dimen/medium_margin"
                 android:text="@string/on_contact_click"/>