diff --git a/docs/formatting.md b/docs/formatting.md
index 58c609d1..d6ca913e 100644
--- a/docs/formatting.md
+++ b/docs/formatting.md
@@ -140,6 +140,12 @@ Conversion specifiers allow to *convert* the value to a different form or type.
     <td><code>{created!d}</code></td>
     <td><code>2010-01-01 00:00:00</code></td>
 </tr>
+<tr>
+    <td align="center"><code>D</code></td>
+    <td>Convert a Unix timestamp or <a href="https://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> string to a <code>datetime</code> object</td>
+    <td><code>{created!D}</code></td>
+    <td><code>2010-01-01 00:00:00</code></td>
+</tr>
 <tr>
     <td align="center"><code>U</code></td>
     <td>Convert HTML entities</td>
diff --git a/gallery_dl/formatter.py b/gallery_dl/formatter.py
index 6affc3eb..d8dc0537 100644
--- a/gallery_dl/formatter.py
+++ b/gallery_dl/formatter.py
@@ -488,6 +488,7 @@ _CONVERSIONS = {
     "L": len,
     "T": util.datetime_to_timestamp_string,
     "d": text.parse_timestamp,
+    "D": util.to_datetime,
     "U": text.unescape,
     "H": lambda s: text.unescape(text.remove_html(s)),
     "g": text.slugify,
diff --git a/test/test_formatter.py b/test/test_formatter.py
index 646f1795..c2bc2840 100644
--- a/test/test_formatter.py
+++ b/test/test_formatter.py
@@ -32,7 +32,7 @@ class TestFormatter(unittest.TestCase):
         "h": "<p>foo </p> &amp; bar <p> </p>",
         "u": "&#x27;&lt; / &gt;&#x27;",
         "t": 1262304000,
-        "ds": "2010-01-01T01:00:00+0100",
+        "ds": "2010-01-01T01:00:00+01:00",
         "dt": datetime.datetime(2010, 1, 1),
         "dt_dst": datetime.datetime(2010, 6, 1),
         "i_str": "12345",
@@ -65,6 +65,13 @@ class TestFormatter(unittest.TestCase):
         self._run_test("{n!S}", "")
         self._run_test("{t!d}", datetime.datetime(2010, 1, 1))
         self._run_test("{t!d:%Y-%m-%d}", "2010-01-01")
+        self._run_test("{t!D}" , datetime.datetime(2010, 1, 1))
+        if sys.hexversion >= 0x3070000:
+            self._run_test("{ds!D}", datetime.datetime(2010, 1, 1))
+        else:
+            self._run_test("{ds!D}", datetime.datetime(1970, 1, 1))
+        self._run_test("{dt!D}", datetime.datetime(2010, 1, 1))
+        self._run_test("{t!D:%Y-%m-%d}", "2010-01-01")
         self._run_test("{dt!T}", "1262304000")
         self._run_test("{l!j}", '["a","b","c"]')
         self._run_test("{dt!j}", '"2010-01-01 00:00:00"')
@@ -232,7 +239,7 @@ class TestFormatter(unittest.TestCase):
 
     def test_datetime(self):
         self._run_test("{ds:D%Y-%m-%dT%H:%M:%S%z}", "2010-01-01 00:00:00")
-        self._run_test("{ds:D%Y}", "2010-01-01T01:00:00+0100")
+        self._run_test("{ds:D%Y}", "2010-01-01T01:00:00+01:00")
         self._run_test("{l:D%Y}", "None")
 
     def test_offset(self):
@@ -488,10 +495,10 @@ def noarg():
             fmt4 = formatter.parse("\fM " + path + ":lengths")
 
         self.assertEqual(fmt1.format_map(self.kwdict), "'Title' by Name")
-        self.assertEqual(fmt2.format_map(self.kwdict), "136")
+        self.assertEqual(fmt2.format_map(self.kwdict), "137")
 
         self.assertEqual(fmt3.format_map(self.kwdict), "'Title' by Name")
-        self.assertEqual(fmt4.format_map(self.kwdict), "136")
+        self.assertEqual(fmt4.format_map(self.kwdict), "137")
 
         with self.assertRaises(TypeError):
             self.assertEqual(fmt0.format_map(self.kwdict), "")