The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Inventory Sequence in all languages 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 561st RedzGoose 🇦🇺 799 62 447ms 10 Sep 2024 561st alemelis 799 62 2,420ms 20 Sep 2024 561st albanian-laundromat 799 62 367ms 4 Aug 2025 561st snoozingnewt 🇨🇦 799 62 380ms 10 Oct 2025 565th MeWhenI 🇻🇦 799 69 92ms 24 Nov 2022 566th blaztoma 🇱🇹 798 119 269ms 16 Aug 2025 567th Shanethegamer 🇺🇸 797 62 9ms 19 Nov 2022 567th jared-hughes 797 62 10ms 16 Mar 2023 567th raphaelimahorn 797 62 9ms 24 Mar 2023 567th Maznek 797 62 9ms 28 Jun 2023 567th unfinishedprogram 797 62 10ms 5 Jul 2023 572nd DialFrost 🇸🇬 796 47 15ms 25 Sep 2024 573rd blaztoma 🇱🇹 796 96 61ms 17 Aug 2025 574th MeWhenI 🇻🇦 796 108 137ms 22 Jul 2024 575th Shanethegamer 🇺🇸 795 83 3,826ms 28 Oct 2024 576th albanian-laundromat 791 177 556ms 15 Oct 2025 577th mdnestor 790 66 38ms 23 Dec 2022 577th jared-hughes 790 66 12ms 16 Mar 2023 577th fgrosshans 🇫🇷 790 66 41ms 14 Jul 2024 577th codingisgreatbutiamnot 790 66 39ms 9 Aug 2024 577th hellwue 790 66 39ms 4 Sep 2024 577th iczelia 🇩🇪 790 66 41ms 23 Oct 2025 583rd emplv 🇱🇻 790 82 99ms 25 Nov 2022 583rd tobeannouncd 790 82 169ms 21 May 2024 585th bac0id 790 95 376ms 30 Jun 2024 586th rucin93 🇵🇱 789 70 17ms 26 Jul 2025 587th 09cf 789 109 124ms 26 Sep 2023 588th Natanaelel 🇸🇪 788 41 6ms 30 Dec 2022 588th o0lit3 🇺🇸 788 41 6ms 20 Jun 2023 590th MeWhenI 🇻🇦 786 46 54ms 24 Nov 2022 590th m-tkach 🇺🇦 786 46 46ms 31 Aug 2023 592nd 09cf 785 33 5ms 5 Sep 2023 592nd mousetail 🇳🇱 785 33 4ms 15 Mar 2024 592nd MeWhenI 🇻🇦 785 33 5ms 17 Feb 2025 595th Natanaelel 🇸🇪 784 63 10ms 21 Jul 2023 596th bac0id 784 75 2ms 27 Sep 2023 597th Shanethegamer 🇺🇸 783 120 30ms 27 Dec 2022 598th Andriamanitra 🇫🇮 782 49 1,021ms 18 Oct 2023 599th albanian-laundromat 781 56 726ms 22 Sep 2025 600th Alessandro-Balconi 🇮🇹 780 63 82ms 12 Jul 2023 601st Irratix 🇳🇱 780 98 78ms 3 Aug 2023 601st Emutis 🇱🇹 780 98 69ms 15 Aug 2025 603rd vishwathg 778 67 29ms 4 Feb 2023 603rd jamesthekee 778 67 14ms 25 Jan 2025 605th Shanethegamer 🇺🇸 776 80 2ms 19 Nov 2022 606th MeWhenI 🇻🇦 776 85 4,144ms 24 Oct 2024 607th albanian-laundromat 775 80 40ms 2 Sep 2025 608th DialFrost 🇸🇬 774 53 297ms 30 Jul 2024 609th namelessiw 774 64 367ms 5 Mar 2024 610th msbranicky 774 178 1,674ms 16 Sep 2025 611th BambooleanLogic 🇸🇪 772 64 9ms 2 Dec 2022 611th tayloia 🇬🇧 772 64 9ms 9 Jan 2023 611th Argeento 🇵🇱 772 64 10ms 29 Aug 2023 614th MeWhenI 🇻🇦 772 84 98ms 24 Nov 2022 615th Shanethegamer 🇺🇸 772 112 26ms 22 Nov 2022 616th jerrandolph 772 123 264ms 21 Dec 2023 617th janbehrens 🇩🇪 769 42 3ms 20 Nov 2022 617th SirBogman 🇺🇸 769 42 2ms 22 Nov 2022 619th Shanethegamer 🇺🇸 769 47 41ms 31 Jan 2023 619th olleicua 🇺🇸 769 47 52ms 5 Jan 2024 621st MichalMarsalek 🇨🇿 767 68 20ms 20 Nov 2022 621st NerdyMcNerd42 767 68 14ms 22 Jan 2023 621st SB-945 767 68 14ms 19 Feb 2024 624th MeWhenI 🇻🇦 766 81 2ms 22 Jul 2024 624th frosster 766 81 2ms 16 Mar 2025 626th GolfingSuccess 🇬🇷 762 63 10ms 19 Dec 2024 627th Stockoh 🇫🇷 762 65 378ms 24 Jun 2024 627th TheZwierzLF 🇵🇱 762 65 356ms 6 days ago 629th strout 762 85 140ms 14 Dec 2023 630th MeWhenI 🇻🇦 758 53 2ms 10 Feb 2023 631st andre-lameirinhas 🇵🇹 756 69 14ms 23 Feb 2023 631st jtaxen 756 69 16ms 30 Mar 2024 631st FranklinJiaChen 756 69 38ms 5 Aug 2024 631st dokutan 756 69 38ms 15 Aug 2024 631st webmiche 756 69 11ms 20 days ago 636th Babafaba 754 78 2ms 14 Oct 2025 637th KatieLG 🇬🇧 753 48 61ms 1 Sep 2024 638th yeminghan2021 750 102 62ms 1 Feb 2025 639th jared-hughes 748 50 13ms 22 Nov 2022 640th bac0id 748 66 10ms 30 Jun 2024 First Prev 561–640 of 1,628 Next Last