The Calendar hole will go live in approximately 12 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 81st AlephSquirrel 739 88 143ms 1 Sep 2024 81st ahmetdemirag 🇨🇾 739 88 10ms 3 Sep 2024 81st hellwue 739 88 10ms 4 Sep 2024 81st Schreipfelerer 739 88 10ms 11 Sep 2024 81st bob-th 739 88 10ms 17 Sep 2024 81st InigoK 🇺🇸 739 88 10ms 18 Sep 2024 81st moustave 739 88 14ms 24 Oct 2024 81st andrewjc2000 739 88 10ms 10 Mar 2025 89th OllieBoyne 🇬🇧 730 89 10ms 9 Sep 2024 89th davecame 730 89 11ms 17 Sep 2024 89th Bmrl7 730 89 9ms 3 Oct 2024 89th DialFrost 🇸🇬 730 89 10ms 21 Nov 2024 89th CommandLeo 🇮🇹 730 89 10ms 22 days ago 89th KasperKivimaeki 🇫🇮 730 89 10ms 19 days ago 95th BlankSpruce 714 91 9ms 1 Sep 2024 95th ZakkkkAttackkkk 🇵🇭 714 91 10ms 1 Sep 2024 95th BREMAUCY 🇫🇷 714 91 10ms 3 Sep 2024 95th charliegaming 714 91 10ms 7 Sep 2024 95th mbittner20 714 91 10ms 9 Sep 2024 95th neihousaigaai 714 91 9ms 28 Sep 2024 95th Rubiksmath 714 91 11ms 1 Oct 2024 95th jameswmccarty 714 91 10ms 2 Dec 2024 95th croc54 714 91 11ms 12 Jan 2025 95th Pyroan 714 91 11ms 24 Feb 2025 95th WillowWispy 714 91 11ms 21 Mar 2025 95th clayboll99 714 91 11ms 15 Jul 2025 95th blaztoma 🇱🇹 714 91 10ms 21 Sep 2025 95th vhoulbreque 🇫🇷 714 91 10ms 21 Nov 2025 95th FortuiteMan 🇫🇷 714 91 11ms 19 days ago 95th LostSyntax21 🇬🇧 714 91 10ms 18 days ago 95th CaedenHarper 🇨🇦 714 91 30ms 17 days ago 95th Lv0Sys 🇵🇱 714 91 9ms 9 days ago 113th fourth-bit 707 92 10ms 4 Sep 2024 113th bnic24 707 92 10ms 5 Sep 2024 115th adamnielson42 🇺🇸 699 93 9ms 7 Oct 2024 115th smiksky 🇺🇸 699 93 10ms 16 Oct 2024 115th guilhem-roy 🇫🇷 699 93 14ms 31 May 2025 118th mousetail 🇳🇱 691 94 13ms 1 Sep 2024 118th ljweel 691 94 10ms 12 Sep 2024 120th msbranicky 684 95 11ms 1 Sep 2024 120th Bulmenisaurus 684 95 12ms 4 Sep 2024 120th btjones0 684 95 10ms 13 Sep 2024 120th jfallon1997 684 95 10ms 26 Sep 2024 120th jacekwladzinski 684 95 10ms 7 Oct 2025 120th aalec 684 95 10ms 8 Nov 2025 126th fgrosshans 🇫🇷 677 96 10ms 1 Sep 2024 126th mm1013g 677 96 11ms 2 Sep 2024 126th Mikey-Beep 🇬🇧 677 96 10ms 2 Sep 2024 126th JudeTyrrell 677 96 10ms 22 Sep 2024 130th scpchicken 🇵🇼 670 97 248ms 8 Sep 2024 130th Carlettos1 670 97 12ms 14 Sep 2024 132nd pickerj 663 98 11ms 13 Sep 2024 132nd dtbao20 🇻🇳 663 98 16ms 30 Sep 2024 132nd YAJUE114514 663 98 10ms 30 Jul 2025 135th alexeldridge 657 99 10ms 14 Sep 2024 135th Just4FunCoder 657 99 10ms 14 Sep 2025 135th 0xjac 🇨🇭 657 99 10ms 25 days ago 138th Kacarott 🇦🇺 650 100 10ms 3 Sep 2024 139th madex 🇩🇪 644 101 14ms 1 Sep 2024 139th RedzGoose 🇦🇺 644 101 10ms 15 Oct 2024 139th Flekay 🇩🇪 644 101 11ms 10 Jul 2025 142nd sciencejiho 637 102 10ms 13 Sep 2024 142nd Papushkado 637 102 9ms 10 Nov 2025 142nd JOrE20 🇺🇸 637 102 10ms 12 days ago 145th julian-hoelz 631 103 10ms 16 Sep 2024 145th StefanHabel 🇨🇦 631 103 97ms 22 Mar 2025 147th ComputerKWasTaken 🇺🇸 625 104 10ms 2 Sep 2024 147th elgan65536 625 104 9ms 23 Sep 2024 147th NickTheEASDude 🇺🇸 625 104 10ms 7 Oct 2025 150th CutSandstone 613 106 13ms 21 Dec 2024 151st galloj 🇨🇿 607 107 10ms 4 Sep 2024 151st jared-hughes 607 107 10ms 10 Sep 2024 151st nstearns96 🇬🇧 607 107 10ms 13 Nov 2024 151st brochmann 🇸🇪 607 107 10ms 16 Oct 2025 155th JesseNoEyes 🇺🇸 602 108 9ms 30 Sep 2024 156th Mabeloid 🇳🇴 596 109 10ms 1 Sep 2024 156th MassimoParisi 596 109 11ms 18 Sep 2024 156th klixel 🇨🇦 596 109 10ms 21 Sep 2024 156th NotNoper 596 109 9ms 29 Oct 2024 156th za3k 596 109 11ms 15 Jul 2025 First Prev 81–160 of 184 Next Last