October 2010 had 5 Fridays, 5 Saturdays and 5 Sundays all in a single month. Some say this happens only every 8 centuries - 823 years to be exact. Cool, man! My kids, grand-kids, great-grand-kids and great-great-grand-kids will never experience that.
Let’s think about this, a year can only start on one of seven days, so there are seven possible basic calendar years. Add leap years, and there are fourteen basic calendars. Period. And one of those calendars only gets used every 823 years? How would that be possible? It’s not of course, all fourteen calenders get cycled through regularly, in fact 2010 uses the exact same calendar as 1999.
5 Fridays, 5 Saturdays, and 5 Sundays in an October will happen again in October 2021. Now my amazement is gone. It will come again when I'm 29.
Here's the thing though: October 2010 had October 10, 2010 or 10-10-10, and it will not happen again until the next millenium. Now that's what I'm talking about!
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