The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
PalindromemordnilaP in Python in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 1st JayXon 🇺🇸 1,000 65 16ms 3 Sep 2024 1st error256 1,000 65 16ms 4 Sep 2024 1st khvdm 1,000 65 16ms 24 Apr 2025 1st Seek64 🇩🇪 1,000 65 18ms 17 days ago 1st sunleonid 1,000 65 15ms 16 days ago 6th btnlq 985 66 15ms 1 Sep 2024 6th pardouin 🇫🇷 985 66 15ms 1 Sep 2024 6th MeWhenI 🇻🇦 985 66 16ms 1 Sep 2024 6th sean-niemann 🇺🇸 985 66 14ms 21 Dec 2024 6th CornerMercury 🇬🇧 985 66 15ms 17 days ago 6th ndren 985 66 15ms 16 days ago 12th duckyluuk 🇳🇱 956 68 11ms 1 Sep 2024 12th SB-945 956 68 11ms 1 Sep 2024 12th hallvabo 🇳🇴 956 68 13ms 16 days ago 12th Mukundan314 956 68 11ms 16 days ago 16th kg583 🇺🇸 942 69 10ms 1 Sep 2024 16th zbreit 🇺🇸 942 69 11ms 1 Sep 2024 16th abhishekg999 942 69 12ms 17 Sep 2024 16th emgordon154 942 69 10ms 26 Sep 2024 16th anter69 🇭🇺 942 69 10ms 11 Oct 2024 16th Babafaba 942 69 11ms 22 Oct 2025 22nd firegene 🇮🇪 929 70 12ms 3 Sep 2024 22nd snoozingnewt 🇨🇦 929 70 12ms 25 days ago 24th starfihs 915 71 157ms 5 Sep 2024 24th dokutan 915 71 10ms 13 Sep 2024 24th KatieLG 🇬🇧 915 71 10ms 14 Sep 2024 24th lifthrasiir 🇰🇷 915 71 14ms 20 Nov 2024 24th plcc0 915 71 10ms 6 Mar 2025 24th keelimeguy 🇺🇸 915 71 10ms 17 May 2025 24th albanian-laundromat 915 71 11ms 5 Jun 2025 31st qpwoeirut 903 72 12ms 1 Oct 2025 32nd HumanoidCPU 878 74 12ms 2 Sep 2024 32nd luuumine 🇫🇷 878 74 11ms 15 Oct 2025 34th Artemis21 🇬🇧 867 75 10ms 10 Jan 2025 35th o0BlackDragon0o 855 76 13ms 8 Sep 2024 35th Bombalech 855 76 12ms 8 Sep 2024 35th JunkIce 855 76 14ms 24 Nov 2024 38th FlorianCassayre 🇫🇷 823 79 14ms 15 Sep 2024 39th nwellnhof 🇩🇪 813 80 16ms 4 Sep 2024 39th canissimia 🇦🇶 813 80 17ms 12 Sep 2024 39th RaBa21 🇭🇺 813 80 10ms 18 Jul 2025 39th 4atj 813 80 16ms 16 days ago 39th HPWiz 🇳🇿 813 80 15ms 12 days ago 39th zgialor-lab 813 80 11ms 22 hours ago 45th bizy-coder 802 81 14ms 1 Sep 2024 45th Natanaelel 🇸🇪 802 81 15ms 1 Sep 2024 45th GrayJoKing 🇦🇺 802 81 15ms 2 Sep 2024 45th bricknellj 802 81 15ms 6 Sep 2024 45th wh3n3v3r 🇨🇿 802 81 10ms 11 Nov 2024 45th xnor-gate 802 81 15ms 4 Mar 2025 45th retrohun 802 81 16ms 9 Mar 2025 45th 051 🇸🇬 802 81 15ms 8 Oct 2025 45th edsrzf 🇳🇿 802 81 16ms 17 days ago 54th jatloe 793 82 11ms 4 Sep 2024 54th rchalamala 793 82 10ms 2 Jan 2025 56th zacjl 774 84 12ms 18 Sep 2024 57th xsot 🇸🇬 756 86 10ms 1 Sep 2024 57th Steffan153 🇫🇮 756 86 11ms 1 Sep 2024 57th SirBogman 🇺🇸 756 86 10ms 2 Sep 2024 57th stefangimmillaro 756 86 10ms 2 Sep 2024 57th m-tkach 🇺🇦 756 86 10ms 2 Sep 2024 57th lynn 756 86 11ms 4 Sep 2024 57th kops-cg 756 86 10ms 11 Feb 2025 57th bzijlema 🇳🇱 756 86 10ms 14 May 2025 57th 5cw 🇺🇸 756 86 10ms 4 Aug 2025 57th ovs-code 🇩🇪 756 86 10ms 17 days ago 67th GolfingSuccess 🇬🇷 747 87 11ms 1 Sep 2024 67th alemelis 747 87 10ms 1 Sep 2024 67th Shanethegamer 🇺🇸 747 87 10ms 1 Sep 2024 67th cros107 🇦🇺 747 87 14ms 2 Sep 2024 67th inventshah 747 87 11ms 2 Sep 2024 67th annaproxy 747 87 11ms 3 Sep 2024 67th BoBz200 747 87 10ms 20 Sep 2024 67th ehulinsky 🇺🇸 747 87 12ms 3 Apr 2025 67th chartung17 747 87 10ms 7 Apr 2025 67th 40fied4t 747 87 10ms 6 May 2025 67th ryyyn 🇺🇸 747 87 11ms 10 Jun 2025 67th commandblockguy 🇺🇸 747 87 11ms 11 Jul 2025 67th hiichbindermax 747 87 10ms 19 Aug 2025 67th robin-scragg 747 87 10ms 18 Oct 2025 1–80 of 184 Next Last