The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Leap Years in Raku in bytes. 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 Bytes Time Submitted 1st HPWiz 🇳🇿 1,000 28 164ms 4 Oct 2020 1st primo-ppcg 🇹🇭 1,000 28 144ms 5 Oct 2020 1st GrayJoKing 🇦🇺 1,000 28 167ms 18 Oct 2020 1st sisyphus-ppcg 🇦🇺 1,000 28 173ms 21 Jun 2021 1st Lydxn 🇨🇦 1,000 28 161ms 25 Sep 2021 1st nwellnhof 🇩🇪 1,000 28 148ms 28 Sep 2021 7th metakuna 848 33 145ms 17 Apr 2019 7th Will-Howard 848 33 127ms 19 Dec 2021 9th somebody1234 800 35 177ms 5 Dec 2018 9th prplz 🇦🇺 800 35 148ms 14 Oct 2020 9th sean-niemann 🇺🇸 800 35 233ms 31 Mar 2022 9th MeWhenI 🇻🇦 800 35 130ms 30 Jan 2023 13th retrohun 778 36 128ms 30 Apr 2019 13th Attero 🇸🇪 778 36 118ms 18 Oct 2020 13th janbehrens 🇩🇪 778 36 126ms 22 May 2021 13th Natanaelel 🇸🇪 778 36 96ms 27 Sep 2021 13th helbling 🇨🇭 778 36 123ms 19 Aug 2024 13th fuzzylojik-golf 🇺🇸 778 36 115ms 28 Jun 2025 19th NewDefectus 🇮🇱 757 37 112ms 27 May 2021 19th SirBogman 🇺🇸 757 37 137ms 4 Nov 2021 19th scpchicken 🇵🇼 757 37 131ms 11 Mar 2022 19th SirFireball3521 757 37 122ms 2 Mar 2023 23rd JRaspass 🇬🇧 737 38 140ms 3 Dec 2018 23rd Indivicivet 737 38 141ms 22 Mar 2021 23rd lynn 737 38 139ms 12 Apr 2021 23rd error256 737 38 118ms 13 May 2024 27th Shanethegamer 🇺🇸 718 39 109ms 22 May 2021 27th voytxt 🇨🇿 718 39 122ms 11 Mar 2024 29th yzhs 🇩🇪 700 40 108ms 7 Mar 2020 29th yokasuretsu 700 40 117ms 2 Jan 2025 31st AlexDaniel 🇪🇪 683 41 114ms 5 Apr 2020 31st heypwesto 🇳🇿 683 41 121ms 20 Apr 2021 31st DaCuteRaccoon 683 41 111ms 12 Dec 2022 31st trist224 🇫🇷 683 41 113ms 14 Dec 2022 31st roguh 🇬🇹 683 41 137ms 14 Jan 2024 36th ash 667 42 133ms 15 Dec 2018 37th itiievskyi 🇺🇦 636 44 149ms 21 Aug 2020 37th dokutan 636 44 109ms 14 Oct 2024 39th elisherer 🇮🇱 622 45 125ms 23 Apr 2019 39th m-dango 622 45 137ms 7 May 2020 39th Betuaredead 622 45 157ms 17 Jan 2023 42nd jjatria 609 46 147ms 11 Jul 2020 43rd Yewzir 🇧🇪 596 47 109ms 7 Feb 2024 44th RustemB 🇷🇺 583 48 138ms 18 May 2020 45th annaproxy 571 49 123ms 14 Feb 2022 46th polyrtm 549 51 139ms 5 Mar 2019 47th alphafalfa 538 52 113ms 9 Dec 2024 48th dymowski 528 53 143ms 13 Jul 2019 49th Phraeyll 509 55 131ms 30 Mar 2019 49th snoozingnewt 🇨🇦 509 55 107ms 6 Oct 2023 51st thisishowmymindworks 🇳🇴 483 58 106ms 22 Jul 2020 51st p-vf 🇨🇭 483 58 118ms 28 Oct 2021 53rd msbranicky 467 60 166ms 10 Sep 2023 54th massung 459 61 147ms 25 Mar 2019 54th juntuu 459 61 122ms 25 Mar 2019 56th mcreenan 418 67 152ms 6 Dec 2018 57th KatieLG 🇬🇧 47 598 113ms 22 days ago 58th KatieLG-Transpiler 🇬🇧 38 735 109ms 24 Jun 2022 58th HumanoidCPU 38 735 121ms 18 May 2024 58th Mabeloid 🇳🇴 38 735 127ms 22 Sep 2024 58th CaedenHarper 🇨🇦 38 735 123ms 16 Aug 2025 62nd lancew 🇳🇿 37 750 132ms 10 Jul 2020 63rd mokymok 🇺🇸 32 880 128ms 10 Nov 2021 1–63 of 63