<condition date-time="2015-12-15 15:00~2015-12-16 15:00">
Without this, the time condition WOULD get redered as:
<condition field="date-time" expression="2015-12-15 15:00~2015-12-16 15:00">
which is incorrect and would always match false in FreeSWITCH.
FreeSWITCH docs for this are here: https://freeswitch.org/confluence/display/FREESWITCH/Time+of+Day+and+Holiday+Routing#TimeofDayandHolidayRouting-Variables
All other time condition variables documented seem to be included in FusionPBX'es XML Handler.