The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Leap Years in all languages 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 798th cywong-amino 🇭🇰 884 50 4ms 20 May 2020 798th Attero 🇸🇪 884 50 4ms 31 Aug 2020 798th sisyphus-ppcg 🇦🇺 884 50 7ms 5 Nov 2020 798th toubsen 🇩🇪 884 50 4ms 26 Dec 2020 798th fuzzylojik-golf 🇺🇸 884 50 4ms 28 Jun 2025 806th primo-ppcg 🇹🇭 884 87 271ms 2 May 2020 807th ETHproductions 🇺🇸 883 37 369ms 22 Dec 2018 807th dokutan 883 37 379ms 18 Mar 2025 809th prplz 🇦🇺 883 48 15ms 19 Sep 2019 809th TFeld00 🇩🇰 883 48 9ms 3 Mar 2020 809th GolfingSuccess 🇬🇷 883 48 16ms 17 Nov 2020 809th urojony 🇵🇱 883 48 19ms 26 Dec 2020 809th btjones0 883 48 17ms 30 Dec 2020 809th Indivicivet 883 48 15ms 22 Mar 2021 809th NewDefectus 🇮🇱 883 48 15ms 27 May 2021 809th Bubbler-4 883 48 9ms 16 Nov 2021 809th KatieLG 🇬🇧 883 48 16ms 2 Jun 2022 809th k3w1k0d3r 883 48 9ms 29 Jun 2022 809th FlorianCassayre 🇫🇷 883 48 15ms 6 Mar 2023 809th quimey 883 48 16ms 15 Jun 2023 809th Andriamanitra 🇫🇮 883 48 15ms 10 Jul 2023 809th stefangimmillaro 883 48 9ms 18 Jul 2023 809th Alex-x90 🇺🇸 883 48 9ms 27 Jul 2023 809th sultan 883 48 9ms 16 Feb 2024 809th driri85 883 48 9ms 16 Feb 2024 809th wen1now 883 48 9ms 1 Mar 2024 809th cpchrispye 883 48 16ms 20 Apr 2024 809th 5cw 🇺🇸 883 48 16ms 6 May 2024 809th egasyelir 883 48 15ms 15 Jul 2024 809th bzijlema 🇳🇱 883 48 15ms 11 Sep 2024 809th moustave 883 48 16ms 9 Jan 2025 809th rollershutter 883 48 16ms 21 Jan 2025 809th Yax42 🇫🇷 883 48 9ms 17 Jun 2025 809th luuumine 🇫🇷 883 48 10ms 29 Oct 2025 835th yanjs 883 53 119ms 3 Jul 2025 836th Steffan153 🇫🇮 882 61 15ms 22 Aug 2024 837th lynn 881 32 3ms 26 Mar 2021 837th perlebach 🇨🇿 881 32 2ms 13 Aug 2021 837th Steffan153 🇫🇮 881 32 3ms 24 Feb 2023 837th sean-niemann 🇺🇸 881 32 2ms 13 Mar 2025 841st initram 881 62 320ms 21 Nov 2021 841st janbehrens 🇩🇪 881 62 321ms 21 Nov 2021 841st jmhowl 881 62 321ms 21 Nov 2021 841st ScottHamper 881 62 314ms 21 Nov 2021 841st Irratix 🇳🇱 881 62 322ms 13 Dec 2021 841st simon-biber 881 62 318ms 7 Feb 2022 841st annaproxy 881 62 316ms 15 Mar 2022 841st voytxt 🇨🇿 881 62 323ms 7 Apr 2022 841st logicolor 881 62 320ms 27 Apr 2022 841st Gaddy 🇫🇷 881 62 321ms 2 May 2022 841st Romain-1 🇫🇷 881 62 320ms 3 May 2022 841st AdrienHache 🇫🇷 881 62 361ms 6 Jun 2023 841st jwonagel 881 62 318ms 25 Sep 2023 841st Babafaba 881 62 360ms 15 Oct 2025 855th Wanderkind 🇰🇷 881 71 458ms 9 Jan 2023 856th emplv 🇱🇻 880 55 99ms 26 Oct 2022 856th voytxt 🇨🇿 880 55 98ms 1 Jan 2023 856th stefangimmillaro 880 55 98ms 20 Jun 2023 856th mulmul9 🇭🇺 880 55 97ms 8 Sep 2023 860th GrayJoKing 🇦🇺 880 57 4ms 16 Jul 2023 861st voytxt 🇨🇿 879 35 981ms 16 May 2022 861st lynn 879 35 886ms 1 Jun 2022 861st emgordon154 879 35 957ms 5 Oct 2025 861st edsrzf 🇳🇿 879 35 998ms 3 hours ago 865th DialFrost 🇸🇬 879 109 431ms 7 Mar 2025 865th MeWhenI 🇻🇦 879 109 490ms 28 Mar 2025 867th MeWhenI 🇻🇦 878 46 4ms 31 Dec 2024 868th sean-niemann 🇺🇸 877 47 95ms 20 Mar 2022 868th MeWhenI 🇻🇦 877 47 103ms 10 Oct 2022 868th Steffan153 🇫🇮 877 47 97ms 9 Feb 2023 868th DialFrost 🇸🇬 877 47 98ms 8 Nov 2023 868th dokutan 877 47 103ms 25 Sep 2024 873rd inventshah 877 50 3ms 9 Sep 2022 873rd janbehrens 🇩🇪 877 50 2ms 14 Sep 2022 875th Re-Adventures 🇮🇳 877 81 76ms 2 Jan 2022 875th Betuaredead 877 81 61ms 4 Jan 2023 875th aksyristos 877 81 60ms 30 Jan 2023 875th CatsAreFluffy 877 81 60ms 19 Feb 2023 875th namcartoon06 877 81 84ms 30 Jun 2023 875th Herbert00709 🇵🇱 877 81 78ms 17 Nov 2023 First Prev 801–880 of 4,741 Next Last