Quote:
CHANGES WITH 197:
* Timer units now support calendar time events in addition to
monotonic time events. That means you can now trigger a unit
based on a calendar time specification such as "Thu,Fri
2013-*-1,5 11:12:13" which refers to 11:12:13 of the first
or fifth day of any month of the year 2013, given that it is
a thursday or friday. This brings timer event support
considerably closer to cron's capabilities. For details on
the supported calendar time specification language see
systemd.time(7).