The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Leyland Numbers in Haskell 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 1st ovs-code 🇩🇪 1,000 73 438ms 30 Jan 2024 1st lynn 1,000 73 486ms 1 Feb 2024 1st HPWiz 🇳🇿 1,000 73 375ms 2 Feb 2024 4th prplz 🇦🇺 961 76 123ms 17 Nov 2020 4th marcin7Cd 961 76 117ms 11 Dec 2020 4th chordowl 961 76 120ms 17 Mar 2021 4th xnor-gate 961 76 115ms 6 Apr 2021 4th kops-cg 961 76 120ms 6 Apr 2021 4th JayXon 🇺🇸 961 76 120ms 14 Sep 2021 4th Lydxn 🇨🇦 961 76 125ms 13 Nov 2021 4th Awsute 961 76 231ms 16 Mar 2022 4th Steffan153 🇫🇮 961 76 120ms 25 Mar 2023 4th Shanethegamer 🇺🇸 961 76 119ms 8 Apr 2023 4th jared-hughes 961 76 121ms 11 Sep 2023 4th btnlq 961 76 120ms 14 Oct 2023 4th Natanaelel 🇸🇪 961 76 115ms 15 Jan 2024 4th edsrzf 🇳🇿 961 76 115ms 15 hours ago 18th the-zammers 948 77 117ms 2 Oct 2023 19th inverseLorentz 🇦🇺 936 78 124ms 9 Mar 2024 20th annaproxy 924 79 125ms 24 Jan 2022 20th cbrt-x 924 79 128ms 18 Oct 2022 20th ashtraypettingzoo 🇺🇸 924 79 236ms 17 Feb 2023 20th tobeannouncd 924 79 122ms 19 Sep 2023 20th strout 924 79 114ms 14 Dec 2023 20th DialFrost 🇸🇬 924 79 125ms 6 Aug 2024 26th arjanadriaanse 🇳🇱 901 81 129ms 10 Feb 2022 26th aDwarfNamedUrist 901 81 127ms 6 Dec 2022 28th RobertHoeh 890 82 229ms 1 Feb 2024 28th YAJUE114514 890 82 117ms 15 Jul 2025 30th iczelia 🇩🇪 880 83 117ms 19 Oct 2025 31st boxjelly 869 84 118ms 6 Jan 2021 31st yzhs 🇩🇪 869 84 121ms 24 Jul 2021 31st snoozingnewt 🇨🇦 869 84 122ms 13 Oct 2025 34th ReidZ3 🇺🇸 839 87 120ms 5 Dec 2020 34th Z-snails 839 87 118ms 2 Mar 2023 36th jtaxen 793 92 117ms 19 Jun 2024 37th Irratix 🇳🇱 785 93 118ms 1 Nov 2021 38th hjcafaroUC 507 144 130ms 8 Aug 2020 39th MeWhenI 🇻🇦 80 907 116ms 7 Jul 2021 40th KatieLG 🇬🇧 73 1,004 116ms 23 Nov 2020 40th retrohun 73 1,004 111ms 28 Dec 2022 40th KatieLG-Transpiler 🇬🇧 73 1,004 110ms 14 May 2023 40th HumanoidCPU 73 1,004 110ms 19 May 2024 40th Mabeloid 🇳🇴 73 1,004 120ms 22 Sep 2024 40th CaedenHarper 🇨🇦 73 1,004 109ms 25 Jan 2025 1–45 of 45
