The Calendar hole will go live in approximately 10 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 641st snoozingnewt 🇨🇦 739 84 2ms 13 Oct 2025 642nd anter69 🇭🇺 738 49 53ms 9 Feb 2023 643rd rucin93 🇵🇱 736 53 133ms 6 Dec 2024 644th vishwathg 736 67 29ms 4 Feb 2023 644th Yewzir 🇧🇪 736 67 15ms 7 Feb 2024 644th wh3n3v3r 🇨🇿 736 67 14ms 14 Nov 2024 644th jamesthekee 736 67 14ms 25 Jan 2025 648th klixel 🇨🇦 735 104 394ms 17 Oct 2024 649th MeWhenI 🇻🇦 735 197 13ms 1 Aug 2023 650th JRaspass 🇬🇧 734 44 2ms 20 Nov 2022 651st frankgraziano 733 51 166ms 27 Feb 2025 652nd blaztoma 🇱🇹 733 90 3,591ms 2 Sep 2025 653rd namelessiw 732 64 367ms 5 Mar 2024 653rd rucin93 🇵🇱 732 64 348ms 31 May 2025 655th edsrzf 🇳🇿 732 81 24ms 17 Jan 2025 656th kg583 🇺🇸 731 85 17ms 16 days ago 657th Shanethegamer 🇺🇸 730 55 6ms 22 Nov 2022 657th snoozingnewt 🇨🇦 730 55 2ms 13 Oct 2025 659th msbranicky 729 103 318ms 10 Jan 2024 660th blaztoma 🇱🇹 728 89 96ms 17 Aug 2025 661st MeWhenI 🇻🇦 728 129 29ms 5 Jun 2023 662nd emgordon154 727 122 111ms 16 days ago 663rd ovs-code 🇩🇪 726 95 28ms 2 Jul 2024 664th MichalMarsalek 🇨🇿 725 68 20ms 20 Nov 2022 664th jmerle 🇳🇱 725 68 22ms 11 Jul 2023 666th emgordon154 725 91 4,190ms 28 Oct 2024 667th TFeld00 🇩🇰 723 50 42ms 3 Sep 2024 668th KatieLG 🇬🇧 723 53 948ms 3 Jan 2024 669th Shanethegamer 🇺🇸 722 86 8ms 23 Nov 2022 669th blaztoma 🇱🇹 722 86 2ms 2 Sep 2025 671st Stockoh 🇫🇷 721 65 378ms 24 Jun 2024 671st JunkIce 721 65 398ms 13 Feb 2025 671st TheZwierzLF 🇵🇱 721 65 356ms 10 days ago 674th MeWhenI 🇻🇦 721 92 16ms 21 May 2023 675th annaproxy 721 106 60ms 23 Jan 2023 675th Babafaba 721 106 2,555ms 14 Oct 2025 677th angel-p57 🇯🇵 721 236 5ms 7 Dec 2023 678th Shanethegamer 🇺🇸 720 57 246ms 19 Nov 2022 679th Shanethegamer 🇺🇸 716 77 125ms 22 Nov 2022 680th ovs-code 🇩🇪 715 65 75ms 19 Sep 2023 681st andre-lameirinhas 🇵🇹 715 69 14ms 23 Feb 2023 681st jtaxen 715 69 16ms 30 Mar 2024 681st FranklinJiaChen 715 69 38ms 5 Aug 2024 684th Irratix 🇳🇱 715 81 2ms 11 Dec 2022 685th snoozingnewt 🇨🇦 714 133 269ms 13 Oct 2025 686th kg583 🇺🇸 712 73 26ms 27 Dec 2024 686th CLOStrophobic 🇮🇹 712 73 25ms 18 Feb 2025 688th MeWhenI 🇻🇦 711 118 1,245ms 14 Jun 2023 689th anter69 🇭🇺 710 54 971ms 24 Feb 2023 690th edsrzf 🇳🇿 710 93 369ms 20 Jun 2025 691st blaztoma 🇱🇹 710 121 122ms 2 Sep 2025 692nd SirBogman 🇺🇸 708 38 251ms 20 Nov 2022 693rd postie77 708 106 342ms 19 May 2023 694th msbranicky 708 108 53ms 10 Jan 2024 695th Jacob385 708 112 440ms 27 Oct 2025 696th trinityy-7 706 70 14ms 17 Mar 2024 697th klixel 🇨🇦 706 82 2ms 17 Oct 2024 698th Steffan153 🇫🇮 706 88 34ms 20 Feb 2024 698th albanian-laundromat 706 88 25ms 22 Jul 2025 700th albanian-laundromat 706 205 12ms 26 Sep 2025 701st DialFrost 🇸🇬 705 69 507ms 31 Jul 2024 702nd b10011 🇫🇮 705 70 16ms 9 Jan 2023 702nd Just4FunCoder 705 70 40ms 23 Mar 2023 702nd knutae 🇳🇴 705 70 14ms 29 Dec 2023 702nd wobblybits 705 70 14ms 18 Aug 2025 702nd jacekwladzinski 705 70 27ms 4 Oct 2025 707th RockOfStone 705 88 2ms 9 Mar 2024 708th MeWhenI 🇻🇦 702 46 2ms 15 Apr 2023 709th blaztoma 🇱🇹 702 70 89ms 17 Aug 2025 710th Yewzir 🇧🇪 699 67 371ms 7 Feb 2024 711th msbranicky 699 123 117ms 19 Sep 2023 712th ovs-code 🇩🇪 697 56 132ms 3 Aug 2024 713th blaztoma 🇱🇹 697 89 38ms 16 Aug 2025 714th Shanethegamer 🇺🇸 697 93 212ms 21 Apr 2025 715th blaztoma 🇱🇹 697 124 26ms 2 Sep 2025 716th akshatj27 🇦🇶 696 71 13ms 12 Dec 2022 717th ovs-code 🇩🇪 696 94 11ms 18 Jul 2023 718th HumanoidCPU 695 52 61ms 26 Jun 2024 719th madex 🇩🇪 695 71 21ms 13 Jun 2023 719th PyryL 🇫🇮 695 71 14ms 23 Aug 2024 First Prev 641–720 of 1,613 Next Last