Google Calendar - last weekday repeating event

I wanted to add a reminder to do my timesheet on the last business day of every month, but there's no easy way to do it within Google Calendar itself.  An anonymous post here worked perfectly:

Steven Occhipinti: Google Calendar - Repeating an event on the last <weekday> of the month


BEGIN:VCALENDAR
BEGIN:VEVENT
DTSTART:20120131
DTEND:20120131
RRULE:FREQ=MONTHLY;BYDAY=MO,TU,WE,TH,FR;BYSETPOS=-1;WKST=SU
SUMMARY:Payday
END:VEVENT
END:VCALENDAR

Save the above to a .ics file. In google next to other calendars choose import calendar.