How can I calculate a month/date delta?
March 25, 2011 8:36 AM Subscribe
Calendar math question: today is March 25, 2011. I found my old watch in a drawer and the time is still correct, but the watch date window says 13. Assuming the date window repeats 1 to 31 and that I always 'set' my watch correctly, what was the most recent month and year that I could have worn it?
posted by unixrat to Science & Nature (11 answers total) 3 users marked this as a favorite
(This isn't a homework question or quiz answer or anything - this is a legit curiosity.)
And the (B) question would be: Is there an easy way of calculating this?