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 377th ndren 921 46 16ms 19 Nov 2023 377th davecame 921 46 16ms 11 Dec 2023 377th rucin93 🇵🇱 921 46 10ms 19 Jan 2024 377th Grrisly 921 46 15ms 27 Mar 2024 377th b-illy 🇬🇧 921 46 16ms 18 Jul 2024 377th zach333 921 46 9ms 20 Jul 2024 377th zacjl 921 46 15ms 20 Sep 2024 377th FlyingPenguin223 921 46 9ms 17 Dec 2024 377th Mukundan314 921 46 16ms 25 Apr 2025 377th fuzzylojik-golf 🇺🇸 921 46 15ms 28 Jun 2025 377th CaedenHarper 🇨🇦 921 46 11ms 24 Jul 2025 377th qpwoeirut 921 46 9ms 24 Aug 2025 377th Babafaba 921 46 16ms 13 Oct 2025 377th 09cf 921 46 18ms 26 days ago 377th ryyyn 🇺🇸 921 46 9ms 17 days ago 377th edsrzf 🇳🇿 921 46 15ms 7 days ago 417th xsot 🇸🇬 921 48 6ms 13 Apr 2024 417th sean-niemann 🇺🇸 921 48 4ms 16 Jul 2024 417th Steffan153 🇫🇮 921 48 4ms 20 Jul 2024 420th Steffan153 🇫🇮 921 54 7ms 13 Jul 2024 420th sean-niemann 🇺🇸 921 54 6ms 23 Jun 2025 420th kg583 🇺🇸 921 54 6ms 21 Aug 2025 423rd Lydxn 🇨🇦 920 68 464ms 27 Feb 2022 423rd sean-niemann 🇺🇸 920 68 472ms 28 Feb 2022 423rd JayXon 🇺🇸 920 68 443ms 28 Feb 2022 423rd GrayJoKing 🇦🇺 920 68 475ms 28 Feb 2022 423rd MeWhenI 🇻🇦 920 68 447ms 10 Oct 2022 423rd ovs-code 🇩🇪 920 68 439ms 31 Dec 2022 423rd Steffan153 🇫🇮 920 68 461ms 1 Jan 2023 423rd DialFrost 🇸🇬 920 68 457ms 8 Nov 2023 423rd dokutan 920 68 432ms 27 Sep 2025 432nd primo-ppcg 🇹🇭 918 45 1ms 7 Nov 2022 432nd xsot 🇸🇬 918 45 2ms 18 Mar 2024 434th GrayJoKing 🇦🇺 917 44 5ms 31 Jan 2025 435th olivermrose 🇺🇸 917 51 118ms 23 Aug 2021 436th nwellnhof 🇩🇪 917 57 2ms 11 Feb 2020 436th primo-ppcg 🇹🇭 917 57 2ms 22 Aug 2020 436th sean-niemann 🇺🇸 917 57 2ms 7 Jun 2022 436th Irratix 🇳🇱 917 57 1ms 13 Jun 2022 436th madex 🇩🇪 917 57 2ms 12 Nov 2022 436th inventshah 917 57 2ms 26 Jan 2023 436th xsot 🇸🇬 917 57 2ms 16 Apr 2023 436th JohandeRuiter 🇳🇱 917 57 2ms 25 Oct 2023 436th dokutan 917 57 2ms 25 Sep 2024 436th FlyingPenguin223 917 57 1ms 10 Feb 2025 436th kdx2a 917 57 1ms 11 Feb 2025 436th Mukundan314 917 57 2ms 26 Apr 2025 436th fuzzylojik-golf 🇺🇸 917 57 1ms 28 Jun 2025 436th Yax42 🇫🇷 917 57 2ms 15 Oct 2025 436th 09cf 917 57 2ms 26 days ago 451st janlelis 916 35 32ms 7 Feb 2021 452nd DialFrost 🇸🇬 916 36 3ms 11 Aug 2024 452nd Steffan153 🇫🇮 916 36 4ms 11 Aug 2024 452nd MeWhenI 🇻🇦 916 36 3ms 12 Aug 2024 452nd sean-niemann 🇺🇸 916 36 3ms 13 Aug 2024 452nd GrayJoKing 🇦🇺 916 36 3ms 26 Aug 2024 452nd lynn 916 36 3ms 21 Dec 2024 458th JayXon 🇺🇸 916 45 94ms 5 Sep 2023 458th primo-ppcg 🇹🇭 916 45 100ms 6 Sep 2023 460th Attero 🇸🇪 916 46 1ms 9 May 2020 460th Waffle3z 916 46 1ms 11 Jul 2021 460th GrayJoKing 🇦🇺 916 46 1ms 9 Feb 2022 460th jared-hughes 916 46 1ms 10 Mar 2022 460th Steffan153 🇫🇮 916 46 1ms 26 Dec 2022 460th MeWhenI 🇻🇦 916 46 1ms 31 Dec 2022 460th b10011 🇫🇮 916 46 1ms 5 Jan 2023 460th sean-niemann 🇺🇸 916 46 1ms 12 Jan 2023 460th DialFrost 🇸🇬 916 46 2ms 8 Nov 2023 460th dokutan 916 46 2ms 25 Sep 2024 460th FlyingPenguin223 916 46 2ms 17 Dec 2024 460th edsrzf 🇳🇿 916 46 2ms 7 days ago 472nd lynn 916 60 26ms 11 Jul 2023 472nd Lydxn 🇨🇦 916 60 25ms 11 Jul 2023 474th Lydxn 🇨🇦 915 41 1ms 8 Oct 2023 474th Steffan153 🇫🇮 915 41 1ms 10 Oct 2023 474th MeWhenI 🇻🇦 915 41 2ms 18 Aug 2024 477th DialFrost 🇸🇬 914 28 251ms 7 days ago 478th voytxt 🇨🇿 913 42 137ms 3 Aug 2024 478th pardouin 🇫🇷 913 42 126ms 5 Aug 2024 480th rambox11 913 44 9ms 20 Dec 2018 First Prev 401–480 of 4,741 Next Last