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Sun Feb 2, 2020, 01:54 AM

Sunday's date is a rare, extra-special palindrome

How’s this for a calendrical trifecta: Sunday is Super Bowl Sunday. And it’s Groundhog Day. And it’s a rare eight-digit palindrome when written as 02/02/2020 — the only one of its kind this century.

A palindrome, as you might know, is a sequence that reads the same forward as it does backward. Aziz Inan, a professor of electrical engineering at the University of Portland, collects dates that are palindromes the way other people might collect coins or chase solar eclipses.

Inan’s website chronicles 500 years’ worth of palindromes, from the 19th century to the 23rd. He’s been waiting for this Sunday since at least Nov. 2, 2011, he said, which was an eight-digit palindrome, too (11/02/2011).

The previous eight-digit palindrome like this was 11/11/1111, 909 years ago. We’ll only have to wait another 101 years for 12/12/2121, but the next one after that comes on March 3, 3030.

At: https://www.washingtonpost.com/science/2020/01/31/sundays-date-is-rare-extra-special-palindrome/



Period depiction of Henry I - who was king of England the last time a date fell on an eight-digit palindrome like this Sunday's.

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Reply Sunday's date is a rare, extra-special palindrome (Original post)
sandensea Feb 2020 OP
2naSalit Feb 2020 #1
RGinNJ Feb 2020 #2
question everything Feb 2020 #3
sprinkleeninow Feb 2020 #4
tclambert Feb 2020 #5
mr_lebowski Feb 2020 #10
ancianita Feb 2020 #6
Rainbow Droid Feb 2020 #7
MasonDreams Feb 2020 #8
trusty elf Feb 2020 #9
Totally Tunsie Apr 2020 #11

Response to sandensea (Original post)

Sun Feb 2, 2020, 02:10 AM

1. That's pretty cool.

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Response to sandensea (Original post)

Sun Feb 2, 2020, 02:36 AM

2. Talk about once in a full moon.

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Response to sandensea (Original post)

Sun Feb 2, 2020, 02:56 AM

3. It also is written the same way by Europeans and Americans

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Response to sandensea (Original post)

Sun Feb 2, 2020, 03:25 AM

4. An oldie, like me....

MADAMIMADAM

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Response to sandensea (Original post)

Sun Feb 2, 2020, 03:25 AM

5. What about 12/02/2021?

And 03/02/2030? (This is kind of fun.)

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Response to tclambert (Reply #5)

Sun Feb 2, 2020, 11:54 AM

10. You're RIGHT!

This article is wrong ... Inan's website is full of crap.

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Response to sandensea (Original post)

Sun Feb 2, 2020, 03:51 AM

6. Stats radar! Madam? Wow!

Thank you.

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Response to sandensea (Original post)

Sun Feb 2, 2020, 03:57 AM

7. Period depictions of Trump I - who believed himself king of America at the current date







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Response to sandensea (Original post)

Sun Feb 2, 2020, 04:50 AM

8. When Napoleon reached his exile isle, (reads backwards)

Able was I ere I saw Elba. Also,
A man a plan a canal Panama. IF you rearrange the spaces a bit.

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Response to sandensea (Original post)

Sun Feb 2, 2020, 06:20 AM

9. ...

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Response to sandensea (Original post)

Sun Apr 26, 2020, 03:42 AM

11. Similar: The date of the next Inaugural

1/20/2021

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