The Calendar hole will go live in approximately 8 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 881st blaztoma 🇱🇹 570 72 251ms 17 Aug 2025 882nd MarcMush 🇫🇷 569 87 431ms 3 Jan 2024 883rd KatieLG 🇬🇧 568 87 72ms 26 Dec 2022 883rd ShiraJoseph 🇺🇸 568 87 13ms 18 Feb 2023 883rd Protothor 568 87 13ms 1 Jun 2025 886th WillowWispy 567 92 10ms 17 Mar 2025 886th osNiko 🇧🇷 567 92 14ms 18 Aug 2025 888th Yewzir 🇧🇪 566 135 83ms 9 Feb 2024 889th nwellnhof 🇩🇪 565 43 37ms 21 Nov 2022 890th emgordon154 564 37 10ms 14 Jun 2025 891st blaztoma 🇱🇹 564 68 936ms 3 Sep 2025 892nd TaserTheFox 🇺🇸 562 73 2,319ms 7 Jun 2023 893rd inverseLorentz 🇦🇺 561 93 16ms 7 Jan 2024 894th msbranicky 558 155 25ms 3 Jan 2024 895th CatsAreFluffy 555 70 2,639ms 31 Jan 2023 896th dokutan 555 89 13ms 27 Sep 2024 897th QuincyNash 🇺🇸 555 94 23ms 27 Nov 2022 898th msbranicky 552 89 91ms 15 Aug 2023 899th tomh1012 552 136 470ms 14 Nov 2025 900th klixel 🇨🇦 551 156 189ms 25 Feb 2025 901st two-bad 🇬🇧 549 90 327ms 24 Feb 2024 902nd msbranicky 547 145 374ms 9 Jan 2024 903rd snoozingnewt 🇨🇦 546 90 90ms 17 Oct 2025 904th msbranicky 546 101 117ms 1 Jan 2024 905th MeWhenI 🇻🇦 544 109 5ms 22 May 2023 906th adamreidsmith 543 96 15ms 16 Feb 2024 907th adamnielson42 🇺🇸 540 48 312ms 29 Aug 2023 908th blaztoma 🇱🇹 538 92 253ms 3 Sep 2025 909th gigaprofisi 🇺🇸 537 92 114ms 1 Nov 2025 910th snoozingnewt 🇨🇦 536 116 10ms 13 Oct 2025 911th Yewzir 🇧🇪 536 140 330ms 11 Feb 2024 911th snoozingnewt 🇨🇦 536 140 380ms 13 Oct 2025 913th TobyBoyne 🇬🇧 532 98 14ms 28 Nov 2022 913th TheLazySquid 532 98 14ms 23 Jan 2023 915th dokutan 529 49 6ms 6 Mar 2025 916th Shanethegamer 🇺🇸 525 99 39ms 16 Dec 2022 917th HumanoidCPU 524 126 170ms 26 Jun 2024 918th MeWhenI 🇻🇦 522 119 10ms 12 Dec 2023 919th dokutan 521 95 311ms 18 Mar 2025 920th TheCod-r 🇦🇶 520 95 12ms 26 Feb 2023 920th Ultra814 520 95 12ms 22 Aug 2025 922nd AlephSquirrel 520 100 14ms 10 Oct 2024 923rd snoozingnewt 🇨🇦 520 106 103ms 13 Oct 2025 924th matejmatik123 🇸🇰 520 147 994ms 2 Oct 2025 925th madex 🇩🇪 516 70 42ms 13 Jun 2023 925th rvs314 516 70 85ms 24 Sep 2024 927th mousetail 🇳🇱 516 84 22ms 16 Sep 2024 928th brimstonetrader 516 101 14ms 8 Jan 2024 929th Shanethegamer 🇺🇸 511 91 96ms 7 Dec 2024 930th jameswmccarty 511 102 17ms 23 Feb 2025 931st Andriamanitra 🇫🇮 509 71 38ms 26 Apr 2023 932nd Yewzir 🇧🇪 507 116 3ms 9 Feb 2024 933rd amollberg 🇸🇪 506 103 20ms 23 Apr 2023 933rd HumanoidCPU 506 103 38ms 26 Jun 2024 933rd ComputerKWasTaken 🇺🇸 506 103 15ms 23 Jan 2025 933rd Andrey2001 506 103 193ms 24 days ago 937th snoozingnewt 🇨🇦 505 157 419ms 13 Oct 2025 938th junkondo-jp 504 98 14ms 2 Jul 2024 939th ridingqwerty 🇺🇸 502 104 14ms 1 Feb 2024 939th Pyroan 502 104 23ms 16 Apr 2025 941st blaztoma 🇱🇹 502 110 2ms 2 Sep 2025 942nd MeWhenI 🇻🇦 502 148 43ms 28 Aug 2024 943rd varhammer 🇷🇺 500 104 86ms 13 Dec 2023 944th snoozingnewt 🇨🇦 499 130 106ms 13 Oct 2025 945th scpchicken 🇵🇼 497 65 14ms 18 Jan 2023 946th NoahBolohan 🇨🇦 497 105 15ms 2 Feb 2023 947th snoozingnewt 🇨🇦 496 122 4ms 13 Oct 2025 948th snoozingnewt 🇨🇦 496 133 131ms 13 Oct 2025 949th blaztoma 🇱🇹 496 148 88ms 2 Sep 2025 950th snoozingnewt 🇨🇦 492 76 11ms 13 Oct 2025 951st TheCod-r 🇦🇶 492 106 15ms 24 Feb 2023 951st adoxography 492 106 16ms 19 Nov 2023 953rd msbranicky 489 101 9ms 8 Jan 2024 954th Yewzir 🇧🇪 489 113 16ms 17 Oct 2023 955th dokutan 488 87 140ms 24 Oct 2024 956th zakariamouhid 484 102 9ms 13 Jun 2023 957th msbranicky 482 129 38ms 24 Dec 2023 958th HumanoidCPU 481 103 391ms 26 Jun 2024 959th 52525rr 480 103 13ms 12 Jun 2025 960th xPMo 479 78 359ms 28 Jun 2024 First Prev 881–960 of 1,630 Next Last