Change the monthly alarm from the 15th of every month at 2pm to the 1st of every month at noon.
[IN:UPDATE_ALARM Change the [SL:PERIOD monthly ] alarm [SL:ALARM_NAME [IN:GET_TIME [SL:DATE_TIME from the 15th of every month at 2 pm ] ] ] [SL:DATE_TIME to the 1st of every month at noon ] . ]