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 318th Steffan153 🇫🇮 933 35 423ms 26 Dec 2022 318th ovs-code 🇩🇪 933 35 478ms 24 Oct 2023 318th DialFrost 🇸🇬 933 35 460ms 8 Nov 2023 324th sean-niemann 🇺🇸 933 47 2ms 9 Sep 2022 324th Lydxn 🇨🇦 933 47 2ms 9 Sep 2022 324th JayXon 🇺🇸 933 47 2ms 10 Sep 2022 324th GrayJoKing 🇦🇺 933 47 2ms 10 Sep 2022 324th MeWhenI 🇻🇦 933 47 2ms 10 Oct 2022 324th Steffan153 🇫🇮 933 47 2ms 9 Feb 2023 324th DialFrost 🇸🇬 933 47 2ms 8 Nov 2023 324th dokutan 933 47 2ms 25 Sep 2024 332nd Lydxn 🇨🇦 931 52 94ms 14 Oct 2022 332nd JayXon 🇺🇸 931 52 96ms 14 Oct 2022 332nd Steffan153 🇫🇮 931 52 102ms 26 Dec 2022 332nd sean-niemann 🇺🇸 931 52 100ms 17 Feb 2023 332nd DialFrost 🇸🇬 931 52 94ms 8 Nov 2023 332nd dokutan 931 52 98ms 25 Sep 2024 338th JayXon 🇺🇸 929 44 3,954ms 27 Oct 2024 339th fuzzylojik-golf 🇺🇸 928 40 374ms 10 Jul 2025 340th kg583 🇺🇸 928 58 5ms 21 Aug 2025 341st sean-niemann 🇺🇸 928 65 424ms 24 Sep 2025 342nd primo-ppcg 🇹🇭 927 48 36ms 13 Jun 2022 342nd Lydxn 🇨🇦 927 48 36ms 13 Jun 2022 342nd JayXon 🇺🇸 927 48 36ms 9 Sep 2022 345th DialFrost 🇸🇬 926 39 702ms 29 Aug 2025 345th sean-niemann 🇺🇸 926 39 646ms 12 Sep 2025 345th edsrzf 🇳🇿 926 39 642ms 6 days ago 348th primo-ppcg 🇹🇭 926 44 80ms 2 May 2020 348th lynn 926 44 79ms 10 Sep 2021 350th Lydxn 🇨🇦 926 52 3ms 30 Sep 2022 351st lynn 926 59 312ms 21 Nov 2021 351st primo-ppcg 🇹🇭 926 59 311ms 21 Nov 2021 351st stefangimmillaro 926 59 314ms 4 Aug 2023 351st sean-niemann 🇺🇸 926 59 333ms 3 Aug 2024 355th JayXon 🇺🇸 926 83 265ms 9 Feb 2022 356th pardouin 🇫🇷 924 50 3ms 25 Apr 2025 357th GrayJoKing 🇦🇺 924 54 8ms 21 Nov 2021 357th Lydxn 🇨🇦 924 54 8ms 21 Nov 2021 357th JayXon 🇺🇸 924 54 8ms 15 Feb 2022 357th annaproxy 924 54 9ms 13 Jan 2023 357th IanUtley 924 54 9ms 19 Jun 2024 357th sean-niemann 🇺🇸 924 54 8ms 6 Jun 2025 363rd Lydxn 🇨🇦 924 67 25ms 16 Apr 2022 364th janbehrens 🇩🇪 923 77 74ms 8 Jan 2022 364th solmyr2000 923 77 65ms 21 Jun 2022 364th annaproxy 923 77 71ms 7 Jan 2023 364th Alex-x90 🇺🇸 923 77 78ms 19 Feb 2023 364th roupiq 🇵🇱 923 77 65ms 17 Nov 2023 364th ovs-code 🇩🇪 923 77 71ms 3 Jun 2024 364th tailorspy 923 77 60ms 23 Sep 2024 364th luuumine 🇫🇷 923 77 72ms 16 Nov 2025 372nd inventshah 922 37 72ms 12 Dec 2022 372nd DialFrost 🇸🇬 922 37 68ms 22 Oct 2023 374th MeWhenI 🇻🇦 922 41 4ms 11 Jun 2021 375th m-tkach 🇺🇦 922 71 2ms 14 Jun 2025 376th xsot 🇸🇬 921 46 15ms 25 Nov 2019 376th primo-ppcg 🇹🇭 921 46 9ms 27 Nov 2019 376th dlenski 921 46 16ms 11 Mar 2020 376th marcin7Cd 921 46 9ms 15 Mar 2020 376th jmhowl 921 46 15ms 20 Mar 2020 376th lenabradley 921 46 16ms 20 Mar 2020 376th loserface69 921 46 16ms 19 May 2020 376th LlamaLad7 🇬🇧 921 46 16ms 19 May 2020 376th hallvabo 🇳🇴 921 46 15ms 7 Nov 2020 376th nwellnhof 🇩🇪 921 46 16ms 1 Jan 2021 376th HETHAT 🇩🇿 921 46 16ms 2 Mar 2021 376th lynn 921 46 16ms 26 Mar 2021 376th GrayJoKing 🇦🇺 921 46 9ms 3 Apr 2021 376th kops-cg 921 46 9ms 6 Apr 2021 376th m-tkach 🇺🇦 921 46 15ms 5 Jun 2021 376th orthoplex 🇨🇽 921 46 10ms 13 Jan 2022 376th jared-hughes 921 46 9ms 10 Mar 2022 376th bricknellj 921 46 15ms 2 Jun 2022 376th MeWhenI 🇻🇦 921 46 10ms 10 Oct 2022 376th ovs-code 🇩🇪 921 46 15ms 27 Nov 2022 376th AlephSquirrel 921 46 11ms 26 Dec 2022 376th neel11235813 921 46 9ms 3 Jan 2023 376th b10011 🇫🇮 921 46 9ms 3 Jan 2023 376th DialFrost 🇸🇬 921 46 11ms 20 Oct 2023 376th ndren 921 46 16ms 19 Nov 2023 First 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