From USA Today:
“Sunday's date is a rare
palindrome that hasn't happened in over 900 years”
Sunday is shaping up to be a
unique day for reasons other than the Super Bowl and Groundhog Day: It's also a
rare palindrome. While various forms of palindrome dates are fairly common,
02/02/2020 has the unique distinction of reading the same backward and forward
when written out in eight digits in multiple date systems, according to
University of Portland professor Aziz Inan. “We are so lucky to have such a
special palindrome date occurring in our lifetime because it’s so rare,” Inan
told USA TODAY Saturday. For starters, it's an eight-digit palindrome:
02022020. Many palindrome dates are only symmetrical if you write the date with
seven digits (1-10-2011) — or in some cases even fewer (9-10-19). But even more
rare, according to Inan, is that Sunday's date is an international palindrome:
It works whether you write the date as "Month/Day/Year" or
"Day/Month/Year," as many countries do. Inan calls such dates
"ubiquitous palindromes," and there won't be another one for 101
years. After that, you'll have to wait until March 3, 3030. According to Inan's
calculations, the last such palindrome date to occur was 11/11/1111 – more than
900 years ago. For years, Inan has been crunching numbers using a basic
calculator and a pad of paper to find unique patterns in dates.
^ This was interesting. ^
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