Square Root Day (and other odd dates)

POSTED: 9:22 AM Nov 11 2011   UPDATED: 11:16 AM Apr 04 2016

With Monday marking Square Root Day, find out more about what makes the day special and learn about some other intriguing dates that have been the source of fascination and speculation.

Square root day
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Bayo/Wikimedia Commons

Monday marks Square Root Day, with both the day of the month and the month being the square root of the last two digits of the year, or 4/4/16. The previous square root day fell on March 3, 2009 (3/3/09), with the next one coming on May 5, 2025 (5/5/25). As you let that sink in, check out some other intriguing dates that have been the source of fascination and speculation.

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