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Since the calendar we use cycles perfectly every 400 years, if you count what day each months 13th falls on, interestingly, the 13th occurs more on Fridays than any other day of the week.
I found in 400 years, there are:
687 Sundays
685 Mondays
685 Tuesdays
687 Wednesdays
684 Thursdays
688 Fridays
684 Saturdays
that are a 13th.
I found in 400 years, there are:
687 Sundays
685 Mondays
685 Tuesdays
687 Wednesdays
684 Thursdays
688 Fridays
684 Saturdays
that are a 13th.
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SF Bay Area
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