Help With Subtracting date

I have 2 dates and I want to substract them.
How can I do that ?
Thanks

The real problem is that the result should be
0H 41M 50S, and the function give me 1H
41M 50S. It gives me +1H that it should be, and I
don't understand why.No. The result should be what you actually got, not what you think it should be. The zero point of Date is midnight on Jan 1, 1970 in GMT. Your timezone is not GMT, but is offset from it by one hour, hence the result you see.
Your goal is rather ill-defined, though. Attempting to show a difference in terms of months and days, when months are not a fixed number of days, does not completely make sense. How many months and days are there between February 28, 2005 and March 31, 2005? And how many months and days are there between February 28, 2004 and March 31, 2004? Did you get the same number even though the second interval is one day longer than the first?

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