The month can be a single month or a list of months. Thus you could change
the 11 above to @samp{'(1 2 3)} and have the entry apply to the last
Thursday of January, February, and March. If the month is @code{t}, the
The month can be a single month or a list of months. Thus you could change
the 11 above to @samp{'(1 2 3)} and have the entry apply to the last
Thursday of January, February, and March. If the month is @code{t}, the