diff --git a/swh/storage/in_memory.py b/swh/storage/in_memory.py
--- a/swh/storage/in_memory.py
+++ b/swh/storage/in_memory.py
@@ -286,29 +286,22 @@
                 individual revisions to add. Each dict has the following keys:
 
                 - id (sha1_git): id of the revision to add
-                - date (datetime.DateTime): date the revision was written
-                - date_offset (int): offset from UTC in minutes the revision
-                  was written
-                - date_neg_utc_offset (boolean): whether a null date_offset
-                  represents a negative UTC offset
-                - committer_date (datetime.DateTime): date the revision got
+                - date (dict): date the revision was written
+                - committer_date (dict): date the revision got
                   added to the origin
-                - committer_date_offset (int): offset from UTC in minutes the
-                  revision was added to the origin
-                - committer_date_neg_utc_offset (boolean): whether a null
-                  committer_date_offset represents a negative UTC offset
                 - type (one of 'git', 'tar'): type of the revision added
                 - directory (sha1_git): the directory the revision points at
                 - message (bytes): the message associated with the revision
-                - author_name (bytes): the name of the revision author
-                - author_email (bytes): the email of the revision author
-                - committer_name (bytes): the name of the revision committer
-                - committer_email (bytes): the email of the revision committer
+                - author (Dict[str, bytes]): dictionary with keys:
+                                             name, fullname, email
+                - committer (Dict[str, bytes]): dictionary with keys:
+                                                name, fullname, email
                 - metadata (jsonb): extra information as dictionary
                 - synthetic (bool): revision's nature (tarball, directory
                   creates synthetic revision)
                 - parents (list of sha1_git): the parents of this revision
 
+        date dictionaries have the form defined in :mod:`swh.model`.
         """
         for revision in revisions:
             if revision['id'] not in self._revisions:
@@ -385,16 +378,13 @@
 
                 - id (sha1_git): id of the release to add
                 - revision (sha1_git): id of the revision the release points to
-                - date (datetime.DateTime): the date the release was made
-                - date_offset (int): offset from UTC in minutes the release was
-                  made
-                - date_neg_utc_offset (boolean): whether a null date_offset
-                  represents a negative UTC offset
+                - date (dict): the date the release was made
                 - name (bytes): the name of the release
                 - comment (bytes): the comment associated with the release
-                - author_name (bytes): the name of the release author
-                - author_email (bytes): the email of the release author
+                - author (Dict[str, bytes]): dictionary with keys:
+                                             name, fullname, email
 
+        the date dictionary has the form defined in :mod:`swh.model`.
         """
         for rel in releases:
             rel['date'] = normalize_timestamp(rel['date'])
diff --git a/swh/storage/storage.py b/swh/storage/storage.py
--- a/swh/storage/storage.py
+++ b/swh/storage/storage.py
@@ -528,11 +528,9 @@
                 individual revisions to add. Each dict has the following keys:
 
                 - id (sha1_git): id of the revision to add
-                - date (datetime.DateTime): date the revision was written
-                - date_offset (int): offset from UTC in minutes the revision
-                  was written
-                - date_neg_utc_offset (boolean): whether a null date_offset
-                  represents a negative UTC offset
+                - date (dict): date the revision was written
+                - committer_date (dict): date the revision got
+                  added to the origin
                 - committer_date (datetime.DateTime): date the revision got
                   added to the origin
                 - committer_date_offset (int): offset from UTC in minutes the
@@ -542,15 +540,16 @@
                 - type (one of 'git', 'tar'): type of the revision added
                 - directory (sha1_git): the directory the revision points at
                 - message (bytes): the message associated with the revision
-                - author_name (bytes): the name of the revision author
-                - author_email (bytes): the email of the revision author
-                - committer_name (bytes): the name of the revision committer
-                - committer_email (bytes): the email of the revision committer
+                - author (Dict[str, bytes]): dictionary with keys:
+                                             name, fullname, email
+                - committer (Dict[str, bytes]): dictionary with keys:
+                                                name, fullname, email
                 - metadata (jsonb): extra information as dictionary
                 - synthetic (bool): revision's nature (tarball, directory
                   creates synthetic revision)
                 - parents (list of sha1_git): the parents of this revision
 
+        date dictionaries have the form defined in :mod:`swh.model`.
         """
         db = self.get_db()
 
@@ -662,16 +661,15 @@
 
                 - id (sha1_git): id of the release to add
                 - revision (sha1_git): id of the revision the release points to
-                - date (datetime.DateTime): the date the release was made
-                - date_offset (int): offset from UTC in minutes the release was
-                  made
+                - date (dict): the date the release was made
                 - date_neg_utc_offset (boolean): whether a null date_offset
                   represents a negative UTC offset
                 - name (bytes): the name of the release
                 - comment (bytes): the comment associated with the release
-                - author_name (bytes): the name of the release author
-                - author_email (bytes): the email of the release author
+                - author (Dict[str, bytes]): dictionary with keys:
+                                             name, fullname, email
 
+        the date dictionary has the form defined in :mod:`swh.model`.
         """
         db = self.get_db()