mscroggs.co.uk
mscroggs.co.uk

subscribe

Blog

 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 formatsFormats
11 September 2019YYMMD,YYMD,MDYY
21 September 2019YYMMD,YYMD,MDYY
31 September 2019YYMMD,YYMD,MDYY
42 February 2020YYYYMMDD,DDMMYYYY,MMDDYYYY,YYYYMDD,YYMDD,DDMYY,MMDYY
52 February 2020YYYYMMDD,DDMMYYYY,MMDDYYYY,YYYYMDD,YYMDD,DDMYY,MMDYY
62 February 2020YYYYMMDD,DDMMYYYY,MMDDYYYY,YYYYMDD,YYMDD,DDMYY,MMDYY
72 February 2020YYYYMMDD,DDMMYYYY,MMDDYYYY,YYYYMDD,YYMDD,DDMYY,MMDYY
A full list of future palindromic dates can be found here.

Similar posts

Dragon curves II
Logical contradictions
Dragon curves
How OEISbot works

Comments

Comments in green were written by me. Comments in blue were not written by me.
 Add a Comment 


I will only use your email address to reply to your comment (if a reply is needed).

Allowed HTML tags: <br> <a> <small> <b> <i> <s> <sup> <sub> <u> <spoiler> <ul> <ol> <li>
To prove you are not a spam bot, please type "e" then "q" then "u" then "a" then "t" then "i" then "o" then "n" in the box below (case sensitive):

Archive

Show me a random blog post
 2019 

Jul 2019

Big Internet Math-Off stickers

Jun 2019

Proving a conjecture

Apr 2019

Harriss and other spirals

Mar 2019

realhats

Jan 2019

Christmas (2018) is over
 2018 
▼ show ▼
 2017 
▼ show ▼
 2016 
▼ show ▼
 2015 
▼ show ▼
 2014 
▼ show ▼
 2013 
▼ show ▼
 2012 
▼ show ▼

Tags

fractals data pizza cutting frobel machine learning final fantasy video games error bars curvature reuleaux polygons javascript electromagnetic field noughts and crosses a gamut of games draughts dataset geometry hats approximation craft dates game show probability flexagons puzzles captain scarlet speed chalkdust magazine christmas estimation tennis realhats harriss spiral menace misleading statistics platonic solids the aperiodical map projections mathsteroids plastic ratio countdown propositional calculus rhombicuboctahedron european cup mathslogicbot bodmas gerry anderson sound world cup trigonometry pac-man logic oeis weather station binary palindromes game of life golden spiral manchester science festival mathsjam latex light football dragon curves pythagoras wool inline code christmas card braiding raspberry pi london underground martin gardner folding paper php folding tube maps big internet math-off matt parker royal baby sorting interpolation accuracy chebyshev reddit triangles probability national lottery ternary news python twitter games graph theory hexapawn manchester bubble bobble chess london polynomials cross stitch statistics programming go books radio 4 asteroids nine men's morris coins arithmetic golden ratio people maths stickers sport rugby

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2019