Change the reminder to send power bill from the 5th to the 1st of each month.
[IN:UPDATE_REMINDER Change the reminder to [SL:TODO send power bill ] [SL:DATE_TIME from the 5th ] [SL:RECURRING_DATE_TIME_NEW [IN:GET_RECURRING_DATE_TIME [SL:DATE_TIME to the 1st ] of [SL:FREQUENCY each month ] ] ] . ]