diff --git a/data/ui/library-toolbar.ui b/data/ui/library-toolbar.ui
index 97cad01..aabcc8f 100644
--- a/data/ui/library-toolbar.ui
+++ b/data/ui/library-toolbar.ui
@@ -129,6 +129,22 @@
                 <property name="position">4</property>
               </packing>
             </child>
+            <child>
+              <object class="GtkRadioButton" id="sort_modified">
+                <property name="label" translatable="yes">sort by modification</property>
+                <property name="visible">True</property>
+                <property name="can-focus">True</property>
+                <property name="receives-default">False</property>
+                <property name="draw-indicator">True</property>
+                <property name="group">sort_year</property>
+                <signal name="toggled" handler="on_sort_toggled" swapped="no"/>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">5</property>
+              </packing>
+            </child>
             <child>
               <object class="GtkCheckButton" id="toolbar_sort_order_button">
                 <property name="label">gtk-sort-descending</property>
@@ -143,7 +159,7 @@
               <packing>
                 <property name="expand">False</property>
                 <property name="fill">True</property>
-                <property name="position">5</property>
+                <property name="position">6</property>
               </packing>
             </child>
           </object>
diff --git a/data/xyz.suruatoel.mcg.gschema.xml b/data/xyz.suruatoel.mcg.gschema.xml
index 934564c..9f50878 100644
--- a/data/xyz.suruatoel.mcg.gschema.xml
+++ b/data/xyz.suruatoel.mcg.gschema.xml
@@ -4,6 +4,7 @@
         <value nick="artist" value="0" />
         <value nick="title" value="1" />
         <value nick="year" value="2" />
+        <value nick="modified" value="3" />
     </enum>
 	<schema path="/xyz/suruatoel/mcg/" id="xyz.suruatoel.mcg" gettext-domain="mcg">
 		<key type="s" name="host">
diff --git a/po/de.mo b/po/de.mo
index da025a5..abfee53 100644
Binary files a/po/de.mo and b/po/de.mo differ
diff --git a/po/de.po b/po/de.po
index 107757f..58ecec7 100644
--- a/po/de.po
+++ b/po/de.po
@@ -2,17 +2,17 @@ msgid ""
 msgstr ""
 "Project-Id-Version: CoverGrid (mcg)\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-09-05 15:08+0200\n"
-"PO-Revision-Date: 2020-10-24 14:41+0200\n"
+"POT-Creation-Date: 2023-01-08 19:06+0100\n"
+"PO-Revision-Date: 2023-01-08 19:07+0100\n"
 "Last-Translator: coderkun <olli@suruatoel.xyz>\n"
 "Language-Team: \n"
 "Language: de_DE\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"X-Generator: Poedit 2.4.1\n"
-"X-Poedit-Basepath: ../../..\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Poedit 3.2.2\n"
+"X-Poedit-Basepath: ../../..\n"
 "X-Poedit-SourceCharset: UTF-8\n"
 
 #: data/xyz.suruatoel.mcg.gschema.xml:11
@@ -216,15 +216,19 @@ msgstr "nach Titel"
 msgid "sort by year"
 msgstr "nach Jahr"
 
-#: data/ui/library-toolbar.ui:169 data/ui/shortcuts-dialog.ui:115
+#: data/ui/library-toolbar.ui:134
+msgid "sort by modification"
+msgstr "nach Änderungsdatum"
+
+#: data/ui/library-toolbar.ui:185 data/ui/shortcuts-dialog.ui:115
 msgid "Search the library"
 msgstr "Die Bibliothek durchsuchen"
 
-#: data/ui/library-toolbar.ui:192 data/ui/playlist-toolbar.ui:15
+#: data/ui/library-toolbar.ui:208 data/ui/playlist-toolbar.ui:15
 msgid "Select multiple albums"
 msgstr "Mehrere Alben auswählen"
 
-#: data/ui/library-toolbar.ui:214
+#: data/ui/library-toolbar.ui:230
 msgid "Settings and actions"
 msgstr "Einstellungen und Aktionen"
 
@@ -353,11 +357,11 @@ msgstr "Zu MPD verbinden"
 msgid "Adjust the volume"
 msgstr "Die Lautstärke anpassen"
 
-#: src/librarypanel.py:419
+#: src/librarypanel.py:421
 msgid "Loading albums"
 msgstr "Alben werden geladen"
 
-#: src/librarypanel.py:519
+#: src/librarypanel.py:521
 msgid "Loading images"
 msgstr "Bilder werden geladen"
 
diff --git a/po/en.mo b/po/en.mo
index 39a611b..8fa584c 100644
Binary files a/po/en.mo and b/po/en.mo differ
diff --git a/po/en.po b/po/en.po
index 9d0eba8..ae94e2b 100644
--- a/po/en.po
+++ b/po/en.po
@@ -2,17 +2,17 @@ msgid ""
 msgstr ""
 "Project-Id-Version: CoverGrid (mcg)\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-09-05 15:08+0200\n"
-"PO-Revision-Date: 2020-10-24 14:40+0200\n"
+"POT-Creation-Date: 2023-01-08 19:06+0100\n"
+"PO-Revision-Date: 2023-01-08 19:07+0100\n"
 "Last-Translator: coderkun <olli@suruatoel.xyz>\n"
 "Language-Team: \n"
 "Language: en\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"X-Generator: Poedit 2.4.1\n"
-"X-Poedit-Basepath: ../../..\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Poedit 3.2.2\n"
+"X-Poedit-Basepath: ../../..\n"
 "X-Poedit-SearchPath-0: mcg\n"
 "X-Poedit-SearchPath-1: data/ui\n"
 
@@ -217,15 +217,19 @@ msgstr "by Title"
 msgid "sort by year"
 msgstr "by Year"
 
-#: data/ui/library-toolbar.ui:169 data/ui/shortcuts-dialog.ui:115
+#: data/ui/library-toolbar.ui:134
+msgid "sort by modification"
+msgstr "by Modification Date"
+
+#: data/ui/library-toolbar.ui:185 data/ui/shortcuts-dialog.ui:115
 msgid "Search the library"
 msgstr "Search the library"
 
-#: data/ui/library-toolbar.ui:192 data/ui/playlist-toolbar.ui:15
+#: data/ui/library-toolbar.ui:208 data/ui/playlist-toolbar.ui:15
 msgid "Select multiple albums"
 msgstr "Select multiple albums"
 
-#: data/ui/library-toolbar.ui:214
+#: data/ui/library-toolbar.ui:230
 msgid "Settings and actions"
 msgstr "Settings and actions"
 
@@ -354,11 +358,11 @@ msgstr "Connect to MPD"
 msgid "Adjust the volume"
 msgstr "Adjust the volume"
 
-#: src/librarypanel.py:419
+#: src/librarypanel.py:421
 msgid "Loading albums"
 msgstr "Loading albums"
 
-#: src/librarypanel.py:519
+#: src/librarypanel.py:521
 msgid "Loading images"
 msgstr "Loading images"
 
diff --git a/po/mcg.pot b/po/mcg.pot
index 19fd383..c409fd6 100644
--- a/po/mcg.pot
+++ b/po/mcg.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: mcg\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-09-05 15:08+0200\n"
+"POT-Creation-Date: 2023-01-08 19:06+0100\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"
@@ -215,15 +215,19 @@ msgstr ""
 msgid "sort by year"
 msgstr ""
 
-#: data/ui/library-toolbar.ui:169 data/ui/shortcuts-dialog.ui:115
+#: data/ui/library-toolbar.ui:134
+msgid "sort by modification"
+msgstr ""
+
+#: data/ui/library-toolbar.ui:185 data/ui/shortcuts-dialog.ui:115
 msgid "Search the library"
 msgstr ""
 
-#: data/ui/library-toolbar.ui:192 data/ui/playlist-toolbar.ui:15
+#: data/ui/library-toolbar.ui:208 data/ui/playlist-toolbar.ui:15
 msgid "Select multiple albums"
 msgstr ""
 
-#: data/ui/library-toolbar.ui:214
+#: data/ui/library-toolbar.ui:230
 msgid "Settings and actions"
 msgstr ""
 
@@ -352,11 +356,11 @@ msgstr ""
 msgid "Adjust the volume"
 msgstr ""
 
-#: src/librarypanel.py:419
+#: src/librarypanel.py:421
 msgid "Loading albums"
 msgstr ""
 
-#: src/librarypanel.py:519
+#: src/librarypanel.py:521
 msgid "Loading images"
 msgstr ""
 
diff --git a/src/client.py b/src/client.py
index 3929d26..cc043d8 100644
--- a/src/client.py
+++ b/src/client.py
@@ -3,6 +3,7 @@
 
 import concurrent.futures
 import configparser
+import dateutil.parser
 import logging
 import os
 import queue
@@ -937,6 +938,8 @@ class Client(Base):
                 track.set_date(song['date'])
             if 'albumartist' in song:
                 track.set_albumartists(song['albumartist'])
+            if 'last-modified' in song:
+                track.set_last_modified(song['last-modified'])
         return track
 
 
@@ -998,6 +1001,7 @@ class MCGAlbum:
         self._host = host
         self._tracks = []
         self._length = 0
+        self._last_modified = None
         self._id = Utils.generate_id(title)
 
 
@@ -1057,6 +1061,9 @@ class MCGAlbum:
         path = os.path.dirname(track.get_file())
         if path not in self._pathes:
             self._pathes.append(path)
+        if track.get_last_modified():
+            if not self._last_modified or track.get_last_modified() > self._last_modified:
+                self._last_modified = track.get_last_modified()
 
 
     def get_tracks(self):
@@ -1067,6 +1074,10 @@ class MCGAlbum:
         return self._length
 
 
+    def get_last_modified(self):
+        return self._last_modified
+
+
     def filter(self, filter_string):
         if len(filter_string) == 0:
             return True
@@ -1102,6 +1113,8 @@ class MCGAlbum:
             value_function = "get_title"
         elif criterion == SortOrder.YEAR:
             value_function = "get_date"
+        elif criterion == SortOrder.MODIFIED:
+            value_function = "get_last_modified"
 
         value1 = getattr(album1, value_function)()
         value2 = getattr(album2, value_function)()
@@ -1137,6 +1150,7 @@ class MCGTrack:
         self._track = None
         self._length = 0
         self._date = None
+        self._last_modified = None
 
 
     def __eq__(self, other):
@@ -1208,6 +1222,18 @@ class MCGTrack:
         return self._file
 
 
+    def set_last_modified(self, date_string):
+        if date_string:
+            try:
+                self._last_modified = dateutil.parser.isoparse(date_string)
+            except ValueError as e:
+                self._logger.debug("Invalid date format: %s", date_string)
+
+
+    def get_last_modified(self):
+        return self._last_modified
+
+
 
 
 class MCGPlaylistTrack(MCGTrack):
diff --git a/src/librarypanel.py b/src/librarypanel.py
index 48b5342..2626c7b 100644
--- a/src/librarypanel.py
+++ b/src/librarypanel.py
@@ -39,6 +39,7 @@ class LibraryToolbar(Gtk.ButtonBox):
     sort_artist = Gtk.Template.Child()
     sort_title = Gtk.Template.Child()
     sort_year = Gtk.Template.Child()
+    sort_modified = Gtk.Template.Child()
     grid_scale = Gtk.Template.Child()
 
 
@@ -50,7 +51,8 @@ class LibraryToolbar(Gtk.ButtonBox):
         self._toolbar_sort_buttons = {
             SortOrder.ARTIST: self.sort_artist,
             SortOrder.TITLE: self.sort_title,
-            SortOrder.YEAR: self.sort_year
+            SortOrder.YEAR: self.sort_year,
+            SortOrder.MODIFIED: self.sort_modified
         }
 
 
diff --git a/src/utils.py b/src/utils.py
index 713c85c..e5a08bd 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -86,3 +86,4 @@ class SortOrder:
     ARTIST = 0
     TITLE = 1
     YEAR = 2
+    MODIFIED = 3