1998-09-19  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* src/format.c (split_time): New code that works correctly
	in the range expected by Microsoft Excel [1900,1900+65535].  We of
	course work on a wider range than Excel can.  We can work on
	pre-1900 dates and on 1900+2^31 dates, but it might make little sense.