Gajim is not able to parse all allowed XEP-202 UTC date formats
Gajim is unable to parse all allowed date formats found in the <utc> element of xep202 time stanzas. For example
\<iq id='uKc7l-44' type='result' email@example.com/Gajim_' from='xxx'> \<time xmlns='urn:xmpp:time'> \<utc>2014-08-28T21:50:12.123+00:00\</utc> \<tzo>+1:00\</tzo> \</time> \</iq>
is not parsed, ie. there is no value shown for "Contact time:".
XEP-202 2. says about 'utc': "The format MUST conform to the dateTime profile specified in XEP-0082 and MUST be expressed in UTC.". XEP-82 3.2 defines it as
where TZD "MUST be either UTC (denoted by addition of the character 'Z' to the end of the string) or some offset from UTC (denoted by addition of '[+|-]' and 'hh:mm' to the end of the string)."
Looking at connection_handlers_events.py TimeResultReceivedEvent, gajim takes into account that the milliseconds are optional, but always assumes that the TZD is 'Z'.