Document hashtag history dicts

docs/index.rst

@@ -299,6 +299,19 @@ Hashtag dicts
     {
         'name': # Hashtag name (not including the #)
         'url': # Hashtag URL (can be remote)
+        'history': # List of usage history dicts for up to 7 days. Not present in statuses.
+    }
+
+Hashtag usage history dicts
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.. _hashtag usage history dict:
+
+.. code-block:: python
+
+    {
+        'day': # Date of the day this history dict is for
+        'uses': # Number of statuses using this hashtag on that day
+        'accounts': # Number of accounts using this hashtag in at least one status on that day
     }
     
 Emoji dicts

mastodon/Mastodon.py

@@ -1894,7 +1894,7 @@ class Mastodon:
         """
         Parse dates in certain known json fields, if possible.
         """
-        known_date_fields = ["created_at", "week"]
+        known_date_fields = ["created_at", "week", "day"]
         for k, v in json_object.items():
             if k in known_date_fields:
                 try: