[horde] HTTP 500 with Horde_ActiveSync_Message_Contact->_parseDate('--11-26')

[Steffen]

An Android client is trying to sync a contact with a birthday without 
year.

Returning HTTP 500 while handling Sync command. [pid 29889 on line 158 of "/var/www/horde/rpc.php"]
Error in communicating with ActiveSync server: Invalid date format [pid 29889 on line 162 of "/usr/share/php/Horde/Rpc/ActiveSync.php"]
#0 /usr/share/php/Horde/ActiveSync/Message/Contact.php(401): Horde_ActiveSync_Message_Base->_parseDate('--11-26')#012#1 /usr/share/php/Horde/ActiveSync/Message/Base.php(360): Horde_ActiveSync_Message_Contact->_parseDate('--11-26')#012#2 /usr/share/php/Horde/ActiveSync/Request/Sync.php(968): Horde_ActiveSync_Message_Base->decodeStream(Object(Horde_ActiveSync_Wbxml_Decoder))#012#3 /usr/share/php/Horde/ActiveSync/Request/Sync.php(798): Horde_ActiveSync_Request_Sync->_parseSyncCommands(Array)#012#4 /usr/share/php/Horde/ActiveSync/Request/Sync.php(201): Horde_ActiveSync_Request_Sync->_parseSyncFolders()#012#5 /usr/share/php/Horde/ActiveSync/Request/Base.php(253): Horde_ActiveSync_Request_Sync->_handle()#012#6 /usr/share/php/Horde/ActiveSync.php(882): Horde_ActiveSync_Request_Base->handle()#012#7 /usr/share/php/Horde/Rpc/ActiveSync.php(143): Horde_ActiveSync->handleRequest('Sync', 'androidc4589945...')#012#8 /var/www/horde/rpc.php(158): Horde_Rpc_ActiveSync->getResponse(NULL)#012#!
 9 {main} [pid 29889 on line 162 of "/usr/share/php/Horde/Rpc/ActiveSync.php"]
Buffer contents:  [pid 29889 on line 162 of "/usr/share/php/Horde/Rpc/ActiveSync.php"]

The ActiveSync log has:

2015-03-03T10:44:09+01:00 DEBUG: [29889] I        <POOMCONTACTS:Birthday>
2015-03-03T10:44:09+01:00 DEBUG: [29889] I          --11-26
2015-03-03T10:44:09+01:00 ERR: Invalid date format

Dunno, if the ActiveSync protocol or whatelse is involved, too, does allow 
a birthday / an anniversary without year.

-- 
Steffen