mscroggs.co.uk
mscroggs.co.uk

subscribe

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 formatsFormats
1Today!YYMDD,DDMYY
2Today!YYMDD,DDMYY
32 January 2021YYMMD,YYMD,MDYY
42 February 2022YYYYMDD,YYMMD,YYMD,DMYY,MDYY
52 February 2022YYYYMDD,YYMMD,YYMD,DMYY,MDYY
61 January 2211YYMMD,DMYYYY,MDYYYY,YYMD,DMYY,MDYY
A full list of future palindromic dates can be found here.

Similar posts

PhD thesis, chapter 2
Dragon curves II
Logical contradictions
Dragon curves

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 "axes" in the box below (case sensitive):

Archive

Show me a random blog post
 2020 

May 2020

A surprising fact about quadrilaterals
Interesting tautologies

Mar 2020

Log-scaled axes

Feb 2020

PhD thesis, chapter ∞
PhD thesis, chapter 5
PhD thesis, chapter 4
PhD thesis, chapter 3
Inverting a matrix
PhD thesis, chapter 2

Jan 2020

PhD thesis, chapter 1
Gaussian elimination
Matrix multiplication
Christmas (2019) is over
 2019 
▼ show ▼
 2018 
▼ show ▼
 2017 
▼ show ▼
 2016 
▼ show ▼
 2015 
▼ show ▼
 2014 
▼ show ▼
 2013 
▼ show ▼
 2012 
▼ show ▼

Tags

world cup map projections coins trigonometry determinants electromagnetic field error bars hats convergence matt parker geometry asteroids simultaneous equations twitter pythagoras curvature bubble bobble polynomials news golden spiral platonic solids palindromes manchester game show probability dataset rugby statistics sobolev spaces royal institution cambridge martin gardner bempp raspberry pi draughts chess london underground latex data visualisation mathslogicbot wave scattering arithmetic exponential growth braiding triangles misleading statistics folding tube maps advent calendar binary probability phd dates game of life national lottery cross stitch logic bodmas matrix of cofactors interpolation squares inline code golden ratio rhombicuboctahedron christmas card approximation ucl data python plastic ratio reddit preconditioning mathsjam football tennis tmip pac-man weak imposition dragon curves craft logs european cup wool graph theory quadrilaterals video games graphs pizza cutting chebyshev captain scarlet javascript sport noughts and crosses harriss spiral matrix multiplication accuracy radio 4 flexagons php reuleaux polygons estimation games matrices weather station boundary element methods inverse matrices go christmas gerry anderson books folding paper london the aperiodical hannah fry people maths talking maths in public machine learning oeis matrix of minors numerical analysis chalkdust magazine fractals sorting hexapawn programming propositional calculus finite element method big internet math-off puzzles a gamut of games light geogebra speed ternary stickers manchester science festival menace gaussian elimination countdown mathsteroids royal baby frobel realhats computational complexity final fantasy signorini conditions nine men's morris sound

Archive

Show me a random blog post
▼ show ▼
© Matthew Scroggs 2012–2020