long ints for time - signed or unsigned?

[Brian Westley]

	Are long integers for time since Jan. 1, 1970 signed?  Our system
uses signed ints, because it screws up after 68 years (2^31 secs) instead
of 136 years (2^32 secs).  After 2038 it goes to 1917 or something.  Please
reply via mail, we are currently restricting newsflow due to batching
problems.
							(signed) Merlyn Leroy