Question 1023196: If 10th October 2014 is a Friday, then what was 3rd September 2013?
Found 2 solutions by 10005, Edwin McCravy:
Answer by 10005(1)   (Show Source):
Answer by Edwin McCravy(20054)  (Show Source):
You can put this solution on YOUR website!
If 10th October 2014 is a Friday, then what was 3rd September 2013?
Let's figure it out.
10th October 2013 was a Thursday, because from a non-leap year to the
next non-leap year, each date moves forward 1 week day, because
365 days is exactly 1 more than a multiple of 7, and 364 = 52*7
One week earlier, 3rd October 2013 was also Thursday. So
1st October was 2 days before Thursday, which would be a
Tuesday.
That means the 30th September 2013 was Monday. Subtracting
4 weeks or 28 days from the 30th gives that 2nd September 2013
was also on Monday, so 3rd September 2013 was a Tuesday.
Edwin
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