Revision 12794: 57_Calendar: BYDAY: recognizes and honors one or several weekdays ...
57_Calendar: BYDAY: recognizes and honors one or several weekdays with and without prefix (e.g. -1SU, 2MO) with MONTHLY
Source: Revision 12794: 57_Calendar: BYDAY: recognizes and honors one or several weekdays ... (http://svn.fhem.de/trac/changeset/12794/trunk)