1 files changed, 33 insertions, 0 deletions
diff --git a/bot/converters.py b/bot/converters.py
index 339da7b60..49ac488f4 100644
--- a/bot/converters.py
+++ b/bot/converters.py
@@ -4,6 +4,7 @@ from datetime import datetime
 from ssl import CertificateError
 from typing import Union
 
+import dateutil.parser
 import discord
 from aiohttp import ClientConnectorError
 from dateutil.relativedelta import relativedelta
@@ -215,3 +216,35 @@ class Duration(Converter):
         now = datetime.utcnow()
 
         return now + delta
+
+
+class ISODateTime(Converter):
+    """"Converts an ISO-8601 datetime string into a datetime.datetime."""
+
+    async def convert(self, ctx: Context, datetime_string: str) -> datetime:
+        """
+        Converts a ISO-8601 `datetime_string` into a `datetime.datetime` object.
+
+        The converter is flexible in the formats it accepts, as it uses the `isoparse` method of
+        `dateutil.parser`. In general, it accepts datetime strings that start with a date,
+        optionally followed by a time.
+
+        See: <https://dateutil.readthedocs.io/en/stable/parser.html#dateutil.parser.isoparse>
+
+        Formats that are guaranteed to be valid by our tests are:
+
+        - `YYYY-mm-ddTHH:MM:SS` | `YYYY-mm-dd HH:MM:SS`
+        - `YYYY-mm-ddTHH:MM` | `YYYY-mm-dd HH:MM`
+        - `YYYY-mm-dd`
+        - `YYYY-mm`
+        - `YYYY`
+
+        Note: ISO-8601 specifies a `T` as the separator between the date and the time part of the
+        datetime string. The converter accepts both a `T` and a single space character.
+        """
+        try:
+            dt = dateutil.parser.isoparse(datetime_string)
+        except ValueError:
+            raise BadArgument(f"`{datetime_string}` is not a valid ISO-8601 datetime string")
+
+        return dt