astro/pdate.c: custom date formatting.
	    Care needs to be taken -- it handles the gregorian
	    change, date(1) does proleptic gregorian.

	auth/cron.c: should be fine, needs a double-check.
	auth/lib/getexpiration.c: see above, may need to remove
	    year offsets.

	auth/secstore/secuser.c: fine, but we can improve it
	    with tmparse().

	aux/msexceltables.c: probably needs to stay, excel dates
	    are fucked.

	aux/gps/gpsfs.c: can use tmnorm(), and fix limits.

	aux/timesync.c: don't need to do anything, but needs a
	    double check.

	calendar.c: custom date formatting can be deleted.

	cwfs/time.c: can use tmnorm()

	date.c: mostly goes away

	webcookies.c: strototime() can go away.

	faces/plumb.c: parsedate() can go away

	gzip/unzip.c: fine, unless we decide to change tm->year.

	ip/ftpfs.c: cracktime() can go away: drugs are bad.

	upas/*: ...it's everywhere.