That's a good idea, grinder. It won't be quite as easy as just writing a routine, since I have to be able to handle any given format coming in, but I think I can hack something together. Just scan the format for either %L or %W and, if I see either one, call Week_of_Year and do the substitution myself. Then I can pass it off to time2str if there are any %'s left.

Not super elegant, perhaps, but definitely workable. Thanx!