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
12 July 2020YYMDD,DDMYY
22 July 2020YYMDD,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 "rebmun" backwards 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

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

Archive

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