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 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 879th Protothor 568 87 13ms 1 Jun 2025 882nd Yewzir 🇧🇪 566 135 83ms 9 Feb 2024 883rd nwellnhof 🇩🇪 565 43 37ms 21 Nov 2022 884th emgordon154 564 37 10ms 14 Jun 2025 885th blaztoma 🇱🇹 564 68 936ms 3 Sep 2025 886th TaserTheFox 🇺🇸 562 73 2,319ms 7 Jun 2023 887th dokutan 561 88 14ms 28 Sep 2024 888th MarcMush 🇫🇷 559 87 431ms 3 Jan 2024 889th msbranicky 558 155 25ms 3 Jan 2024 890th msbranicky 552 89 91ms 15 Aug 2023 891st tomh1012 552 136 470ms 14 Nov 2025 892nd klixel 🇨🇦 551 156 189ms 25 Feb 2025 893rd dokutan 549 71 127ms 28 Sep 2024 894th two-bad 🇬🇧 549 90 327ms 24 Feb 2024 895th SirFireball3521 548 90 14ms 23 Jan 2023 895th yuchuehw 548 90 15ms 10 Feb 2024 895th robin-scragg 548 90 14ms 25 Oct 2025 898th msbranicky 547 145 374ms 9 Jan 2024 899th snoozingnewt 🇨🇦 546 90 90ms 17 Oct 2025 900th msbranicky 546 101 117ms 1 Jan 2024 901st MeWhenI 🇻🇦 546 136 43ms 4 Sep 2024 902nd dokutan 545 114 45ms 1 Aug 2024 903rd MeWhenI 🇻🇦 544 109 5ms 22 May 2023 904th LeeCamp 542 91 33ms 8 Jan 2023 904th aksyristos 542 91 978ms 17 Jan 2023 906th Yewzir 🇧🇪 540 139 330ms 11 Feb 2024 907th gigaprofisi 🇺🇸 537 92 114ms 1 Nov 2025 908th WillowWispy 536 92 10ms 17 Mar 2025 908th osNiko 🇧🇷 536 92 14ms 18 Aug 2025 910th snoozingnewt 🇨🇦 536 116 10ms 13 Oct 2025 911th snoozingnewt 🇨🇦 536 140 380ms 13 Oct 2025 912th adamnielson42 🇺🇸 533 47 312ms 29 Aug 2023 913th inverseLorentz 🇦🇺 530 93 16ms 7 Jan 2024 914th blaztoma 🇱🇹 529 92 253ms 3 Sep 2025 915th QuincyNash 🇺🇸 525 94 23ms 27 Nov 2022 916th Shanethegamer 🇺🇸 525 99 39ms 16 Dec 2022 917th dokutan 523 93 311ms 18 Mar 2025 918th HumanoidCPU 523 126 170ms 26 Jun 2024 919th dokutan 522 48 6ms 6 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 adamreidsmith 514 96 15ms 16 Feb 2024 929th Shanethegamer 🇺🇸 511 91 96ms 7 Dec 2024 930th Andriamanitra 🇫🇮 509 71 38ms 26 Apr 2023 931st RaBa21 🇭🇺 508 97 18ms 19 Jul 2025 932nd snoozingnewt 🇨🇦 505 157 419ms 13 Oct 2025 933rd junkondo-jp 504 98 14ms 2 Jul 2024 934th Yewzir 🇧🇪 504 115 3ms 9 Feb 2024 935th TobyBoyne 🇬🇧 503 98 14ms 28 Nov 2022 935th TheLazySquid 503 98 14ms 23 Jan 2023 937th blaztoma 🇱🇹 502 110 2ms 2 Sep 2025 938th varhammer 🇷🇺 500 104 86ms 13 Dec 2023 939th snoozingnewt 🇨🇦 499 130 106ms 13 Oct 2025 940th scpchicken 🇵🇼 497 65 14ms 18 Jan 2023 941st snoozingnewt 🇨🇦 496 133 131ms 13 Oct 2025 942nd snoozingnewt 🇨🇦 492 76 11ms 13 Oct 2025 943rd msbranicky 489 101 9ms 8 Jan 2024 944th Yewzir 🇧🇪 489 113 16ms 17 Oct 2023 945th brimstonetrader 488 101 14ms 8 Jan 2024 946th zakariamouhid 484 102 9ms 13 Jun 2023 946th jameswmccarty 484 102 17ms 23 Feb 2025 948th snoozingnewt 🇨🇦 482 122 4ms 13 Oct 2025 949th msbranicky 482 129 38ms 24 Dec 2023 950th 52525rr 480 103 13ms 12 Jun 2025 951st xPMo 479 78 359ms 28 Jun 2024 952nd amollberg 🇸🇪 479 103 20ms 23 Apr 2023 952nd ComputerKWasTaken 🇺🇸 479 103 15ms 23 Jan 2025 952nd Andrey2001 479 103 193ms 19 days ago 955th snoozingnewt 🇨🇦 477 86 2,333ms 13 Oct 2025 956th blaztoma 🇱🇹 476 136 125ms 17 Aug 2025 957th ridingqwerty 🇺🇸 474 104 14ms 1 Feb 2024 957th Pyroan 474 104 23ms 16 Apr 2025 959th inventshah 474 240 134ms 22 Nov 2022 960th snoozingnewt 🇨🇦 472 162 3,252ms 13 Oct 2025 First Prev 881–960 of 1,612 Next Last