I was able to change my album timestamp as follows:
album.timestamp = gdata.photos.Timestamp( text="%d000" % time.mktime((2010, 02, 03, 12, 00, 00, -1, -1, -1))) updated_album = gd_client.Put( album, album.GetEditLink().href, converter=gdata.photos.AlbumEntryFromString)
Obviously, my code is different from yours (and I literally just started with gdata api today), but it shows how to create a new timestamp object and assign it to the album's time method.
http://code.google.com/apis/picasaweb/docs/1.0/developers_guide_python.html#ModifyAlbums
NTN
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