# File lib/icalendar/tzinfo.rb, line 67 def rrule start = local_start.to_datetime # this is somewhat of a hack, but seems to work ok [sprintf( "FREQ=YEARLY;BYMONTH=%d;BYDAY=%d%s", start.month, ((start.day - 1)/ 7).to_i + 1, start.strftime("%a").upcase[0,2] )] end