The Calendar hole will go live in approximately 13 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 794th fuzzylojik-golf 🇺🇸 884 50 4ms 28 Jun 2025 802nd primo-ppcg 🇹🇭 884 87 271ms 2 May 2020 803rd ETHproductions 🇺🇸 883 37 369ms 22 Dec 2018 803rd dokutan 883 37 379ms 18 Mar 2025 805th prplz 🇦🇺 883 48 15ms 19 Sep 2019 805th TFeld00 🇩🇰 883 48 9ms 3 Mar 2020 805th GolfingSuccess 🇬🇷 883 48 16ms 17 Nov 2020 805th urojony 🇵🇱 883 48 19ms 26 Dec 2020 805th btjones0 883 48 17ms 30 Dec 2020 805th Indivicivet 883 48 15ms 22 Mar 2021 805th NewDefectus 🇮🇱 883 48 15ms 27 May 2021 805th Bubbler-4 883 48 9ms 16 Nov 2021 805th KatieLG 🇬🇧 883 48 16ms 2 Jun 2022 805th k3w1k0d3r 883 48 9ms 29 Jun 2022 805th FlorianCassayre 🇫🇷 883 48 15ms 6 Mar 2023 805th quimey 883 48 16ms 15 Jun 2023 805th Andriamanitra 🇫🇮 883 48 15ms 10 Jul 2023 805th stefangimmillaro 883 48 9ms 18 Jul 2023 805th Alex-x90 🇺🇸 883 48 9ms 27 Jul 2023 805th sultan 883 48 9ms 16 Feb 2024 805th driri85 883 48 9ms 16 Feb 2024 805th wen1now 883 48 9ms 1 Mar 2024 805th cpchrispye 883 48 16ms 20 Apr 2024 805th 5cw 🇺🇸 883 48 16ms 6 May 2024 805th egasyelir 883 48 15ms 15 Jul 2024 805th bzijlema 🇳🇱 883 48 15ms 11 Sep 2024 805th moustave 883 48 16ms 9 Jan 2025 805th rollershutter 883 48 16ms 21 Jan 2025 805th Yax42 🇫🇷 883 48 9ms 17 Jun 2025 805th luuumine 🇫🇷 883 48 10ms 29 Oct 2025 831st yanjs 882 53 119ms 3 Jul 2025 832nd Steffan153 🇫🇮 882 61 15ms 22 Aug 2024 833rd lynn 881 32 3ms 26 Mar 2021 833rd perlebach 🇨🇿 881 32 2ms 13 Aug 2021 833rd Steffan153 🇫🇮 881 32 3ms 24 Feb 2023 833rd sean-niemann 🇺🇸 881 32 2ms 13 Mar 2025 837th initram 881 62 320ms 21 Nov 2021 837th janbehrens 🇩🇪 881 62 321ms 21 Nov 2021 837th jmhowl 881 62 321ms 21 Nov 2021 837th ScottHamper 881 62 314ms 21 Nov 2021 837th Irratix 🇳🇱 881 62 322ms 13 Dec 2021 837th simon-biber 881 62 318ms 7 Feb 2022 837th annaproxy 881 62 316ms 15 Mar 2022 837th voytxt 🇨🇿 881 62 323ms 7 Apr 2022 837th logicolor 881 62 320ms 27 Apr 2022 837th Gaddy 🇫🇷 881 62 321ms 2 May 2022 837th Romain-1 🇫🇷 881 62 320ms 3 May 2022 837th AdrienHache 🇫🇷 881 62 361ms 6 Jun 2023 837th jwonagel 881 62 318ms 25 Sep 2023 837th Babafaba 881 62 360ms 15 Oct 2025 851st Wanderkind 🇰🇷 881 71 458ms 9 Jan 2023 852nd emplv 🇱🇻 880 55 99ms 26 Oct 2022 852nd voytxt 🇨🇿 880 55 98ms 1 Jan 2023 852nd stefangimmillaro 880 55 98ms 20 Jun 2023 852nd mulmul9 🇭🇺 880 55 97ms 8 Sep 2023 856th GrayJoKing 🇦🇺 880 57 4ms 16 Jul 2023 857th voytxt 🇨🇿 879 35 981ms 16 May 2022 857th lynn 879 35 886ms 1 Jun 2022 857th emgordon154 879 35 957ms 5 Oct 2025 860th DialFrost 🇸🇬 879 109 431ms 7 Mar 2025 860th MeWhenI 🇻🇦 879 109 490ms 28 Mar 2025 862nd sean-niemann 🇺🇸 877 47 95ms 20 Mar 2022 862nd MeWhenI 🇻🇦 877 47 103ms 10 Oct 2022 862nd Steffan153 🇫🇮 877 47 97ms 9 Feb 2023 862nd DialFrost 🇸🇬 877 47 98ms 8 Nov 2023 862nd dokutan 877 47 103ms 25 Sep 2024 867th inventshah 877 50 3ms 9 Sep 2022 867th janbehrens 🇩🇪 877 50 2ms 14 Sep 2022 869th Re-Adventures 🇮🇳 877 81 76ms 2 Jan 2022 869th Betuaredead 877 81 61ms 4 Jan 2023 869th aksyristos 877 81 60ms 30 Jan 2023 869th CatsAreFluffy 877 81 60ms 19 Feb 2023 869th namcartoon06 877 81 84ms 30 Jun 2023 869th Herbert00709 🇵🇱 877 81 78ms 17 Nov 2023 869th HumanoidCPU 877 81 63ms 19 Feb 2024 876th MeWhenI 🇻🇦 876 46 4ms 31 Dec 2024 877th JayXon 🇺🇸 876 121 1,653ms 15 Sep 2025 878th Steffan153 🇫🇮 875 39 70ms 26 Dec 2022 878th Alessandro-Balconi 🇮🇹 875 39 72ms 26 Dec 2022 880th Yewzir 🇧🇪 875 55 3ms 29 Mar 2024 First Prev 801–880 of 4,736 Next Last