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Palindrome Day 20200202

blog.sumymus.de

11–20 of 187 posts

Re: Palindrome Day 20200202

#13
The nice thing about today's date, 2020-02-02, is that it is palindrome in three date formats: YYYYMMDD, DDMMYYYY, and MMDDYYYY.

This should probably be called "Universal Palindrome Day" because it is a palindrome irrespective of the endianness (big, little, or middle) that is used in various countries.

Here is the list of all such dates until the year 9999:

  0101-10-10
  1010-01-01
  1111-11-11
  2020-02-02
  2121-12-12
  3030-03-03
  4040-04-04
  5050-05-05
  6060-06-06
  7070-07-07
  8080-08-08
  9090-09-09
The next such one is over 101 years away from now.

Here is my own blog post on this topic: https://susam.in/blog/universal-palindrome-day/ :-)

Re: Palindrome Day 20200202

#14
post #13

The nice thing about today's date, 2020-02-02, is that it is palindrome in three date formats: YYYYMMDD, DDMMYYYY, and MMDDYYYY. This should probably be called "Universal Palindrome Day" because it is a palindrome irrespective of the endianness (big, little, or middle) that is used in various countries. Here is the list of all such dates until the year 9999: 0101-10-10 1010-01-01 1111-11-11 2020-02-02 2121-12-12 3030…

So it happened like 900 yrs ago and after next one it almost take 900 yrs for same date to happen. And I am alive on one of this rare event. Need to cut Cake. :)

Re: Palindrome Day 20200202

#15

Earlier quoted context omitted.

And, if you write your dates that way, what will the one after that be? 30100103?

In a thousand years, we might be on yet another calendar system. https://en.wikipedia.org/wiki/List_of_calendars

I think we already are using another calendar system! Most used dates in existence are probably using Unix time, at least I know I only check the calendar a few times a day but I have systems running checking it multiple times per second.

Re: Palindrome Day 20200202

#16
post #14
post #13

The nice thing about today's date, 2020-02-02, is that it is palindrome in three date formats: YYYYMMDD, DDMMYYYY, and MMDDYYYY. This should probably be called "Universal Palindrome Day" because it is a palindrome irrespective of the endianness (big, little, or middle) that is used in various countries. Here is the list of all such dates until the year 9999: 0101-10-10 1010-01-01 1111-11-11 2020-02-02 2121-12-12 3030…

So it happened like 900 yrs ago and after next one it almost take 900 yrs for same date to happen. And I am alive on one of this rare event. Need to cut Cake. :)

Not to sound corny but if you really think about it every single day is rare, just in different ways.

Re: Palindrome Day 20200202

#18
post #14

Earlier quoted context omitted.

So it happened like 900 yrs ago and after next one it almost take 900 yrs for same date to happen. And I am alive on one of this rare event. Need to cut Cake. :)

Not to sound corny but if you really think about it every single day is rare, just in different ways.

Reminds me of the interesting number paradox[1]. This can be easily extended to dates too in this manner:

Every date is interesting. Proof by contradiction: If there exists a non-empty set of uninteresting dates, there would be an earliest date in this set. But the earliest such date is itself interesting because it is the earliest uninteresting date, thus producing a contradiction.

[1]: https://en.wikipedia.org/wiki/Interesting_number_paradox

Re: Palindrome Day 20200202

#20
post #13

The nice thing about today's date, 2020-02-02, is that it is palindrome in three date formats: YYYYMMDD, DDMMYYYY, and MMDDYYYY. This should probably be called "Universal Palindrome Day" because it is a palindrome irrespective of the endianness (big, little, or middle) that is used in various countries. Here is the list of all such dates until the year 9999: 0101-10-10 1010-01-01 1111-11-11 2020-02-02 2121-12-12 3030…

2030-03-03
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