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 375th rucin93 🇵🇱 921 46 10ms 19 Jan 2024 375th Grrisly 921 46 15ms 27 Mar 2024 375th b-illy 🇬🇧 921 46 16ms 18 Jul 2024 375th zach333 921 46 9ms 20 Jul 2024 375th zacjl 921 46 15ms 20 Sep 2024 375th FlyingPenguin223 921 46 9ms 17 Dec 2024 375th Mukundan314 921 46 16ms 25 Apr 2025 375th fuzzylojik-golf 🇺🇸 921 46 15ms 28 Jun 2025 375th CaedenHarper 🇨🇦 921 46 11ms 24 Jul 2025 375th qpwoeirut 921 46 9ms 24 Aug 2025 375th Babafaba 921 46 16ms 13 Oct 2025 375th 09cf 921 46 18ms 22 days ago 375th ryyyn 🇺🇸 921 46 9ms 14 days ago 375th edsrzf 🇳🇿 921 46 15ms 4 days ago 415th xsot 🇸🇬 921 48 6ms 13 Apr 2024 415th sean-niemann 🇺🇸 921 48 4ms 16 Jul 2024 415th Steffan153 🇫🇮 921 48 4ms 20 Jul 2024 418th Steffan153 🇫🇮 921 54 7ms 13 Jul 2024 418th sean-niemann 🇺🇸 921 54 6ms 23 Jun 2025 418th kg583 🇺🇸 921 54 6ms 21 Aug 2025 421st Lydxn 🇨🇦 920 68 464ms 27 Feb 2022 421st sean-niemann 🇺🇸 920 68 472ms 28 Feb 2022 421st JayXon 🇺🇸 920 68 443ms 28 Feb 2022 421st GrayJoKing 🇦🇺 920 68 475ms 28 Feb 2022 421st MeWhenI 🇻🇦 920 68 447ms 10 Oct 2022 421st ovs-code 🇩🇪 920 68 439ms 31 Dec 2022 421st Steffan153 🇫🇮 920 68 461ms 1 Jan 2023 421st DialFrost 🇸🇬 920 68 457ms 8 Nov 2023 421st dokutan 920 68 432ms 27 Sep 2025 430th primo-ppcg 🇹🇭 918 45 1ms 7 Nov 2022 430th xsot 🇸🇬 918 45 2ms 18 Mar 2024 432nd GrayJoKing 🇦🇺 917 44 5ms 31 Jan 2025 433rd olivermrose 🇺🇸 917 51 118ms 23 Aug 2021 434th nwellnhof 🇩🇪 917 57 2ms 11 Feb 2020 434th primo-ppcg 🇹🇭 917 57 2ms 22 Aug 2020 434th sean-niemann 🇺🇸 917 57 2ms 7 Jun 2022 434th Irratix 🇳🇱 917 57 1ms 13 Jun 2022 434th madex 🇩🇪 917 57 2ms 12 Nov 2022 434th inventshah 917 57 2ms 26 Jan 2023 434th xsot 🇸🇬 917 57 2ms 16 Apr 2023 434th JohandeRuiter 🇳🇱 917 57 2ms 25 Oct 2023 434th dokutan 917 57 2ms 25 Sep 2024 434th FlyingPenguin223 917 57 1ms 10 Feb 2025 434th kdx2a 917 57 1ms 11 Feb 2025 434th Mukundan314 917 57 2ms 26 Apr 2025 434th fuzzylojik-golf 🇺🇸 917 57 1ms 28 Jun 2025 434th Yax42 🇫🇷 917 57 2ms 15 Oct 2025 434th 09cf 917 57 2ms 22 days ago 449th janlelis 916 35 32ms 7 Feb 2021 450th DialFrost 🇸🇬 916 36 3ms 11 Aug 2024 450th Steffan153 🇫🇮 916 36 4ms 11 Aug 2024 450th MeWhenI 🇻🇦 916 36 3ms 12 Aug 2024 450th sean-niemann 🇺🇸 916 36 3ms 13 Aug 2024 450th GrayJoKing 🇦🇺 916 36 3ms 26 Aug 2024 450th lynn 916 36 3ms 21 Dec 2024 456th JayXon 🇺🇸 916 45 94ms 5 Sep 2023 456th primo-ppcg 🇹🇭 916 45 100ms 6 Sep 2023 458th Attero 🇸🇪 916 46 1ms 9 May 2020 458th Waffle3z 916 46 1ms 11 Jul 2021 458th GrayJoKing 🇦🇺 916 46 1ms 9 Feb 2022 458th jared-hughes 916 46 1ms 10 Mar 2022 458th Steffan153 🇫🇮 916 46 1ms 26 Dec 2022 458th MeWhenI 🇻🇦 916 46 1ms 31 Dec 2022 458th b10011 🇫🇮 916 46 1ms 5 Jan 2023 458th sean-niemann 🇺🇸 916 46 1ms 12 Jan 2023 458th DialFrost 🇸🇬 916 46 2ms 8 Nov 2023 458th dokutan 916 46 2ms 25 Sep 2024 458th FlyingPenguin223 916 46 2ms 17 Dec 2024 458th edsrzf 🇳🇿 916 46 2ms 4 days ago 470th lynn 916 60 26ms 11 Jul 2023 470th Lydxn 🇨🇦 916 60 25ms 11 Jul 2023 472nd Lydxn 🇨🇦 915 41 1ms 8 Oct 2023 472nd Steffan153 🇫🇮 915 41 1ms 10 Oct 2023 472nd MeWhenI 🇻🇦 915 41 2ms 18 Aug 2024 475th DialFrost 🇸🇬 914 28 251ms 3 days ago 476th voytxt 🇨🇿 913 42 137ms 3 Aug 2024 476th pardouin 🇫🇷 913 42 126ms 5 Aug 2024 478th rambox11 913 44 9ms 20 Dec 2018 478th skps2010 913 44 9ms 4 Jan 2019 478th obarakon 913 44 8ms 9 Jan 2019 First Prev 401–480 of 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