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 721st blaztoma 🇱🇹 702 70 89ms 17 Aug 2025 722nd msbranicky 699 123 117ms 19 Sep 2023 723rd blaztoma 🇱🇹 697 89 38ms 16 Aug 2025 724th Shanethegamer 🇺🇸 697 93 212ms 21 Apr 2025 725th blaztoma 🇱🇹 697 124 26ms 2 Sep 2025 726th MeWhenI 🇻🇦 696 61 132ms 3 Aug 2024 727th akshatj27 🇦🇶 696 71 13ms 12 Dec 2022 728th ovs-code 🇩🇪 696 94 11ms 18 Jul 2023 729th HumanoidCPU 695 52 61ms 26 Jun 2024 730th betaveros 695 75 13ms 31 Dec 2022 730th Wildst 695 75 14ms 7 Jul 2023 730th mosho-p 695 75 21ms 14 Sep 2023 730th eiburns 695 75 18ms 26 Oct 2023 734th CaedenHarper 🇨🇦 695 114 597ms 6 Oct 2025 735th MeWhenI 🇻🇦 693 54 9ms 17 Nov 2023 736th emgordon154 690 29 89ms 14 Nov 2025 737th Shanethegamer 🇺🇸 690 86 30ms 21 Apr 2023 738th snoozingnewt 🇨🇦 689 90 40ms 13 Oct 2025 739th h3ra993huskp 🇯🇵 689 115 462ms 23 days ago 740th msbranicky 688 72 416ms 17 Jan 2024 741st prestosilver 🇺🇸 688 96 138ms 4 days ago 742nd Edjyzod 686 76 20ms 31 Mar 2023 743rd Yewzir 🇧🇪 686 106 459ms 7 Feb 2024 744th BREMAUCY 🇫🇷 682 53 46ms 19 May 2023 744th annaproxy 682 53 53ms 22 Sep 2023 744th TheZwierzLF 🇵🇱 682 53 52ms 2 days ago 747th msbranicky 682 91 2ms 29 Sep 2023 748th MeWhenI 🇻🇦 681 91 38ms 17 Feb 2023 749th blaztoma 🇱🇹 679 97 81ms 2 Sep 2025 750th janbehrens 🇩🇪 678 73 286ms 23 Nov 2022 751st blaztoma 🇱🇹 678 132 120ms 25 days ago 752nd Kacarott 🇦🇺 678 251 3ms 27 Aug 2024 753rd KrausRaus 🇺🇸 677 73 13ms 7 Dec 2022 753rd LordSir101 677 73 14ms 8 Aug 2025 755th Squidled 677 77 14ms 3 Jan 2023 755th mbittner20 677 77 14ms 27 May 2023 755th xyangst 677 77 14ms 7 Oct 2024 758th snoozingnewt 🇨🇦 677 127 120ms 13 Oct 2025 759th Shanethegamer 🇺🇸 676 98 20ms 23 Nov 2022 760th arctouch-cristiannevianna 676 111 345ms 31 May 2023 761st Yewzir 🇧🇪 676 204 2,509ms 14 Nov 2025 762nd ovs-code 🇩🇪 672 90 24ms 21 Nov 2022 763rd KatieLG 🇬🇧 672 98 106ms 15 Jan 2023 764th olleicua 🇺🇸 667 30 355ms 11 Mar 2024 765th janAkali 🇷🇺 667 99 118ms 17 May 2025 766th msbranicky 661 98 102ms 10 Jan 2024 767th typeswitch-dev 🇵🇹 661 99 7ms 17 Aug 2023 768th kmathis22 661 120 790ms 27 Oct 2025 769th Shanethegamer 🇺🇸 660 75 326ms 22 Apr 2025 770th Techdude01 660 79 14ms 20 Jan 2023 770th rollershutter 660 79 43ms 4 Jul 2023 770th bob-th 660 79 14ms 19 Aug 2023 770th qwjhvbxi 660 79 15ms 6 Feb 2024 774th CaedenHarper 🇨🇦 658 114 381ms 20 Oct 2025 775th tatzyr 🇯🇵 657 55 55ms 12 Feb 2025 776th MeWhenI 🇻🇦 655 75 89ms 13 Dec 2022 777th RedzGoose 🇦🇺 655 99 97ms 11 Oct 2024 778th MeWhenI 🇻🇦 655 100 4ms 20 Jul 2023 779th CarsonChr 🇺🇸 653 115 349ms 7 Apr 2024 780th copy 652 32 3ms 2 Oct 2025 781st blaztoma 🇱🇹 652 76 460ms 2 Sep 2025 782nd Vaekor 652 80 15ms 9 Jul 2023 782nd rucin93 🇵🇱 652 80 22ms 10 Feb 2024 782nd JunkIce 652 80 14ms 26 Dec 2024 782nd fuzzylojik-golf 🇺🇸 652 80 15ms 9 Jun 2025 782nd Flekay 🇩🇪 652 80 14ms 10 Jul 2025 787th emgordon154 652 91 27ms 30 Dec 2024 788th snoozingnewt 🇨🇦 652 101 86ms 13 Oct 2025 789th weliveinhell 🇭🇹 650 76 16ms 18 Sep 2023 789th itserasmus 650 76 14ms 9 Apr 2024 789th eranws 650 76 13ms 23 Dec 2024 792nd edsrzf 🇳🇿 650 80 27ms 27 Aug 2025 793rd blaztoma 🇱🇹 647 102 123ms 3 Sep 2025 794th snoozingnewt 🇨🇦 644 68 734ms 13 Oct 2025 795th fkantelberg 644 81 11ms 23 Jul 2023 795th CutSandstone 644 81 13ms 4 Jul 2024 797th xyangst 641 77 13ms 7 Oct 2024 798th msbranicky 641 103 120ms 19 Sep 2023 799th snoozingnewt 🇨🇦 640 97 2ms 13 Oct 2025 800th Lydxn 🇨🇦 639 124 371ms 24 Jun 2023 First Prev 721–800 of 1,630 Next Last