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
19 December 2019DMMYY
22 January 2020YYMDD,DDMYY
32 February 2020YYYYMMDD,DDMMYYYY,MMDDYYYY,YYYYMDD,YYMDD,DDMYY,MMDYY
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 "equation" in the box below (case sensitive):

Archive

Show me a random blog post
 2019 

Sep 2019

A non-converging LaTeX document
TMiP 2019 treasure punt

Jul 2019

Big Internet Math-Off stickers 2019

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

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

Archive

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