Blog
Palindromic dates
2016-10-06
Thanks to Marc, I noticed that today's date is a palindrome in two different date formats—DMMYY (61016) and DMMYYYY (6102016).
This made me wonder when there will be another date that is palindromic in multiple date formats, so I wrote a Python script to find out.
Turns out there's not too long to wait: 10 July 2017 will be palindromic in two date formats (MDDYY and MDDYYYY). But before that, there's 1 July 2017, which is palindromic in three date formats (YYMMD, YYMD and MDYY). Most exciting of all, however, is 2 February 2020, which is palindromic in 7 different formats!
The next palindromic dates are shown in the following table. It will update as the dates pass.
| \(n\) | Next day with \(\geq n\) palindromic formats | Formats |
| 1 | 20 April 2024 | MDDYYYY,MDDYY |
| 2 | 20 April 2024 | MDDYYYY,MDDYY |
| 3 | 2 May 2025 | YYMMD,YYMD,MDYY |
| 4 | 2 March 2030 | YYYYMMDD,MMDDYYYY,YYYYMDD,MMDYY |
| 5 | 1 January 2110 | DDMYYYY,YYMDD,DDMYY,MMDYYYY,MMDYY |
| 6 | 1 January 2211 | YYMMD,DMYYYY,MDYYYY,YYMD,DMYY,MDYY |
A full list of future palindromic dates can be found here.
(Click on one of these icons to react to this blog post)
You might also enjoy...
Comments
Comments in green were written by me. Comments in blue were not written by me.
Add a Comment