diff --git a/libdino/src/dino_i18n.h b/libdino/src/dino_i18n.h
index e1a65f41..bf6e1347 100644
--- a/libdino/src/dino_i18n.h
+++ b/libdino/src/dino_i18n.h
@@ -3,6 +3,7 @@
 
 #include<libintl.h>
 
-#define dino_gettext(String) ((char *) dgettext (GETTEXT_PACKAGE, String))
+#define dino_gettext(MsgId) ((char *) dgettext (GETTEXT_PACKAGE, MsgId))
+#define dino_ngettext(MsgId, MsgIdPlural, Int) ((char *) dngettext (GETTEXT_PACKAGE, MsgId, MsgIdPlural, Int))
 
 #endif
\ No newline at end of file
diff --git a/libdino/src/util.vala b/libdino/src/util.vala
index 29186aa0..03d6ee26 100644
--- a/libdino/src/util.vala
+++ b/libdino/src/util.vala
@@ -23,6 +23,9 @@ public class SearchPathGenerator {
 [CCode (cname = "dino_gettext", cheader_filename = "dino_i18n.h")]
 public static extern unowned string _(string s);
 
+[CCode (cname = "dino_ngettext", cheader_filename = "dino_i18n.h")]
+public static extern unowned string n(string msgid, string plural, ulong number);
+
 [CCode (cname = "bindtextdomain", cheader_filename = "libintl.h")]
 private static extern unowned string? bindtextdomain(string domainname, string? dirname);
 
diff --git a/main/po/POTFILES.in b/main/po/POTFILES.in
index cf47561b..d3009749 100644
--- a/main/po/POTFILES.in
+++ b/main/po/POTFILES.in
@@ -11,6 +11,7 @@ data/menu_encryption.ui
 data/settings_dialog.ui
 src/ui/add_conversation/conference/add_groupchat_dialog.vala
 src/ui/add_conversation/conference/dialog.vala
+src/ui/conversation_selector/conversation_row.vala
 src/ui/conversation_summary/message_item.vala
 src/ui/conversation_summary/view.vala
 src/ui/manage_accounts/add_account_dialog.vala
diff --git a/main/po/de.po b/main/po/de.po
index 61690d2a..3b708ef9 100644
--- a/main/po/de.po
+++ b/main/po/de.po
@@ -2,11 +2,12 @@ msgid ""
 msgstr ""
 "Project-Id-Version: dino-0.0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2017-04-10 15:10+0200\n"
+"POT-Creation-Date: 2017-04-13 13:48+0200\n"
 "Language: de\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=n != 1\n"
 
 #: data/add_conversation/add_contact_dialog.ui:11
 #: data/add_conversation/add_groupchat_dialog.ui:11
@@ -118,10 +119,78 @@ msgstr "Weiter"
 msgid "Join"
 msgstr "Beitreten"
 
-#: src/ui/conversation_summary/message_item.vala:107
+#. Day and month
+#: src/ui/conversation_selector/conversation_row.vala:175
+#, no-c-format
+msgid "%b %d"
+msgstr "%d. %b"
+
+#: src/ui/conversation_selector/conversation_row.vala:179
+msgid "Yesterday"
+msgstr "Gestern"
+
+#. Time in 24h format (w/o seconds)
+#: src/ui/conversation_selector/conversation_row.vala:182
+#: src/ui/conversation_summary/message_item.vala:110
+#, no-c-format
+msgid "%H∶%M"
+msgstr "%H∶%M"
+
+#. Time in 12h format (w/o seconds)
+#: src/ui/conversation_selector/conversation_row.vala:183
+#: src/ui/conversation_summary/message_item.vala:111
+#, no-c-format
+msgid "%l∶%M %p"
+msgstr "%l∶%M %p"
+
+#: src/ui/conversation_selector/conversation_row.vala:186
+#: src/ui/conversation_summary/message_item.vala:114
+#, c-format
+msgid "%i min ago"
+msgid_plural "%i mins ago"
+msgstr[0] "vor %i min"
+msgstr[1] "vor %i mins"
+
+#: src/ui/conversation_selector/conversation_row.vala:188
+#: src/ui/conversation_summary/message_item.vala:116
 msgid "Just now"
 msgstr "Gerade eben"
 
+#. Date + time in 24h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:98
+#, no-c-format
+msgid "%x, %H∶%M"
+msgstr "%x, %H∶%M"
+
+#. Date + time in 12h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:99
+#, no-c-format
+msgid "%x, %l∶%M %p"
+msgstr "%x, %l∶%M %p"
+
+#. Month, day and time in 24h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:102
+#, no-c-format
+msgid "%b %d, %H∶%M"
+msgstr "%d. %b, %H∶%M"
+
+#. Month, day and time in 12h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:103
+#, no-c-format
+msgid "%b %d, %l∶%M %p"
+msgstr "%d. %b, %l∶%M %p"
+
+#. Day of week and time in 12h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:106
+#, no-c-format
+msgid "%a, %H∶%M"
+msgstr "%a, %H∶%M"
+
+#: src/ui/conversation_summary/message_item.vala:107
+#, no-c-format
+msgid "%a, %l∶%M %p"
+msgstr "%a, %l∶%M %p"
+
 #: src/ui/conversation_summary/view.vala:120
 msgid "is typing..."
 msgstr "tippt gerade..."
@@ -167,15 +236,15 @@ msgstr "Fehler"
 msgid "Start private conversation"
 msgstr "Private Konversation beginnen"
 
-#: src/ui/notifications.vala:59
+#: src/ui/notifications.vala:64
 msgid "Subscription request"
 msgstr "Kontaktanfrage"
 
-#: src/ui/notifications.vala:61
+#: src/ui/notifications.vala:66
 msgid "Accept"
 msgstr "Annehmen"
 
-#: src/ui/notifications.vala:74
+#: src/ui/notifications.vala:79
 msgid "Deny"
 msgstr "Ablehnen"
 
diff --git a/main/po/dino.pot b/main/po/dino.pot
index 620ffeb3..cb9d03b2 100644
--- a/main/po/dino.pot
+++ b/main/po/dino.pot
@@ -8,14 +8,15 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2017-04-10 15:10+0200\n"
+"POT-Creation-Date: 2017-04-13 13:48+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
 "Language: \n"
 "MIME-Version: 1.0\n"
-"Content-Type: text/plain; charset=CHARSET\n"
+"Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=INTEGER; plural=EXPRESSION;\n"
 
 #: data/add_conversation/add_contact_dialog.ui:11
 #: data/add_conversation/add_groupchat_dialog.ui:11
@@ -127,10 +128,78 @@ msgstr ""
 msgid "Join"
 msgstr ""
 
-#: src/ui/conversation_summary/message_item.vala:107
+#. Day and month
+#: src/ui/conversation_selector/conversation_row.vala:175
+#, no-c-format
+msgid "%b %d"
+msgstr ""
+
+#: src/ui/conversation_selector/conversation_row.vala:179
+msgid "Yesterday"
+msgstr ""
+
+#. Time in 24h format (w/o seconds)
+#: src/ui/conversation_selector/conversation_row.vala:182
+#: src/ui/conversation_summary/message_item.vala:110
+#, no-c-format
+msgid "%H∶%M"
+msgstr ""
+
+#. Time in 12h format (w/o seconds)
+#: src/ui/conversation_selector/conversation_row.vala:183
+#: src/ui/conversation_summary/message_item.vala:111
+#, no-c-format
+msgid "%l∶%M %p"
+msgstr ""
+
+#: src/ui/conversation_selector/conversation_row.vala:186
+#: src/ui/conversation_summary/message_item.vala:114
+#, c-format
+msgid "%i min ago"
+msgid_plural "%i mins ago"
+msgstr[0] ""
+msgstr[1] ""
+
+#: src/ui/conversation_selector/conversation_row.vala:188
+#: src/ui/conversation_summary/message_item.vala:116
 msgid "Just now"
 msgstr ""
 
+#. Date + time in 24h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:98
+#, no-c-format
+msgid "%x, %H∶%M"
+msgstr ""
+
+#. Date + time in 12h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:99
+#, no-c-format
+msgid "%x, %l∶%M %p"
+msgstr ""
+
+#. Month, day and time in 24h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:102
+#, no-c-format
+msgid "%b %d, %H∶%M"
+msgstr ""
+
+#. Month, day and time in 12h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:103
+#, no-c-format
+msgid "%b %d, %l∶%M %p"
+msgstr ""
+
+#. Day of week and time in 12h format (w/o seconds)
+#: src/ui/conversation_summary/message_item.vala:106
+#, no-c-format
+msgid "%a, %H∶%M"
+msgstr ""
+
+#: src/ui/conversation_summary/message_item.vala:107
+#, no-c-format
+msgid "%a, %l∶%M %p"
+msgstr ""
+
 #: src/ui/conversation_summary/view.vala:120
 msgid "is typing..."
 msgstr ""
@@ -176,15 +245,15 @@ msgstr ""
 msgid "Start private conversation"
 msgstr ""
 
-#: src/ui/notifications.vala:59
+#: src/ui/notifications.vala:64
 msgid "Subscription request"
 msgstr ""
 
-#: src/ui/notifications.vala:61
+#: src/ui/notifications.vala:66
 msgid "Accept"
 msgstr ""
 
-#: src/ui/notifications.vala:74
+#: src/ui/notifications.vala:79
 msgid "Deny"
 msgstr ""
 
diff --git a/main/src/ui/conversation_selector/conversation_row.vala b/main/src/ui/conversation_selector/conversation_row.vala
index d05973db..2e7e321a 100644
--- a/main/src/ui/conversation_selector/conversation_row.vala
+++ b/main/src/ui/conversation_selector/conversation_row.vala
@@ -170,17 +170,22 @@ public abstract class ConversationRow : ListBoxRow {
          if (timespan > 365 * TimeSpan.DAY) {
              return datetime.get_year().to_string();
          } else if (timespan > 7 * TimeSpan.DAY) {
-             return datetime.format("%d.%m");
+             // Day and month
+             // xgettext:no-c-format
+             return datetime.format(_("%b %d"));
          } else if (timespan > 2 * TimeSpan.DAY) {
              return datetime.format("%a");
          } else if (timespan > 1 * TimeSpan.DAY) {
-             return "Yesterday";
+             return _("Yesterday");
          } else if (timespan > 9 * TimeSpan.MINUTE) {
-             return datetime.format("%H:%M");
+             return datetime.format(Util.is_24h_format() ?
+                /* xgettext:no-c-format */ /* Time in 24h format (w/o seconds) */ _("%H\u2236%M") :
+                /* xgettext:no-c-format */ /* Time in 12h format (w/o seconds) */ _("%l\u2236%M %p"));
          } else if (timespan > 1 * TimeSpan.MINUTE) {
-             return (timespan / TimeSpan.MINUTE).to_string() + " min ago";
+             ulong mins = (ulong) (timespan.abs() / TimeSpan.MINUTE);
+             return n("%i min ago", "%i mins ago", mins).printf(mins);
          } else {
-             return "Just now";
+             return _("Just now");
          }
     }
 }
diff --git a/main/src/ui/conversation_summary/message_item.vala b/main/src/ui/conversation_summary/message_item.vala
index 4b26a289..74d46805 100644
--- a/main/src/ui/conversation_summary/message_item.vala
+++ b/main/src/ui/conversation_summary/message_item.vala
@@ -94,15 +94,24 @@ public class MessageItem : Grid, ConversationItem {
         DateTime now = new DateTime.now_local();
         TimeSpan timespan = now.difference(datetime);
         if (timespan > 365 * TimeSpan.DAY) {
-            return datetime.format("%d.%m.%Y %H:%M");
+            return datetime.format(Util.is_24h_format() ?
+                /* xgettext:no-c-format */ /* Date + time in 24h format (w/o seconds) */ _("%x, %H\u2236%M") :
+                /* xgettext:no-c-format */ /* Date + time in 12h format (w/o seconds)*/ _("%x, %l\u2236%M %p"));
         } else if (timespan > 7 * TimeSpan.DAY) {
-            return datetime.format("%d.%m %H:%M");
+            return datetime.format(Util.is_24h_format() ?
+                /* xgettext:no-c-format */ /* Month, day and time in 24h format (w/o seconds) */ _("%b %d, %H\u2236%M") :
+                /* xgettext:no-c-format */ /* Month, day and time in 12h format (w/o seconds) */ _("%b %d, %l\u2236%M %p"));
         } else if (timespan > 1 * TimeSpan.DAY) {
-            return datetime.format("%a, %H:%M");
+            return datetime.format(Util.is_24h_format() ?
+                /* xgettext:no-c-format */ /* Day of week and time in 12h format (w/o seconds) */ _("%a, %H\u2236%M") :
+                /* xgettext:no-c-format */ _("%a, %l\u2236%M %p"));
         } else if (timespan > 9 * TimeSpan.MINUTE) {
-            return datetime.format("%H:%M");
+            return datetime.format(Util.is_24h_format() ?
+                /* xgettext:no-c-format */  /* Time in 24h format (w/o seconds) */ _("%H\u2236%M") :
+                /* xgettext:no-c-format */  /* Time in 12h format (w/o seconds) */ _("%l\u2236%M %p"));
         } else if (timespan > TimeSpan.MINUTE) {
-            return (timespan / TimeSpan.MINUTE).to_string() + " min ago";
+            ulong mins = (ulong) (timespan.abs() / TimeSpan.MINUTE);
+            return n("%i min ago", "%i mins ago", mins).printf(mins);
         } else {
             return _("Just now");
         }
diff --git a/main/src/ui/util.vala b/main/src/ui/util.vala
index 4df785c0..696ce2d1 100644
--- a/main/src/ui/util.vala
+++ b/main/src/ui/util.vala
@@ -112,6 +112,13 @@ public class Util : Object {
         Gdk.RGBA bg = widget.get_style_context().get_background_color(StateFlags.NORMAL);
         return (bg.red < 0.5 && bg.green < 0.5 && bg.blue < 0.5);
     }
+
+    public static bool is_24h_format() {
+        GLib.Settings settings = new GLib.Settings("org.gnome.desktop.interface");
+        string settings_format = settings.get_string("clock-format");
+        string p_format = (new DateTime.now_local()).format("%p");
+        return settings_format == "24h" || p_format == " ";
+    }
 }
 
 }
\ No newline at end of file