>What part is undocumented? CTOT, HOUR, and MINUTE are all documented. Maybe I'm missing something . . .

Passing a time, with no date part to the CTOT function and getting back 12/30/1899 plus your time.

Any other non-valid datetime entry returns and empty datetime, but passing just the time, magically gives you a valid date of 12/30/1899...I don't see that documented anywhere