The Calendar hole will go live in approximately 7 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 239th xnor-gate 887 73 171ms 23 Nov 2022 239th lynn 887 73 168ms 27 Jan 2023 239th Steffan153 🇫🇮 887 73 171ms 20 Feb 2023 239th jared-hughes 887 73 165ms 13 Sep 2023 245th JayXon 🇺🇸 887 82 464ms 22 Nov 2022 245th Steffan153 🇫🇮 887 82 428ms 14 Aug 2024 245th sean-niemann 🇺🇸 887 82 376ms 9 May 2025 248th canissimia 🇦🇶 887 192 3ms 7 Dec 2022 249th acotis 886 97 132ms 31 Mar 2025 250th m-tkach 🇺🇦 886 106 28ms 18 Jan 2024 250th Steffan153 🇫🇮 886 106 28ms 27 Aug 2024 252nd GrayJoKing 🇦🇺 885 48 128ms 13 Aug 2024 252nd emplv 🇱🇻 885 48 125ms 1 Nov 2024 254th GrayJoKing 🇦🇺 885 67 283ms 22 Aug 2023 255th GrayJoKing 🇦🇺 885 83 309ms 26 Jun 2023 255th JayXon 🇺🇸 885 83 313ms 27 Jun 2023 257th zacjl 885 84 53ms 14 Feb 2025 258th JayXon 🇺🇸 884 56 356ms 21 Jan 2024 258th Steffan153 🇫🇮 884 56 400ms 15 Aug 2024 258th bizy-coder 884 56 382ms 1 Sep 2024 258th kg583 🇺🇸 884 56 358ms 22 Dec 2024 262nd andersk 🇺🇸 884 59 34ms 20 Nov 2022 262nd bricknellj 884 59 29ms 1 Dec 2022 262nd neel11235813 884 59 32ms 22 Feb 2023 262nd btjones0 884 59 33ms 23 Feb 2023 262nd gabrielsqw 884 59 11ms 17 Apr 2023 262nd RYNO8 884 59 10ms 4 Sep 2023 262nd inventshah 884 59 11ms 22 Jan 2024 262nd davecame 884 59 31ms 14 Mar 2024 262nd duckyluuk 🇳🇱 884 59 32ms 26 May 2024 262nd Bulmenisaurus 884 59 30ms 22 Oct 2024 262nd snydej 884 59 10ms 21 Nov 2024 262nd lifthrasiir 🇰🇷 884 59 21ms 3 Dec 2024 262nd CaedenHarper 🇨🇦 884 59 30ms 30 Dec 2024 262nd ryyyn 🇺🇸 884 59 30ms 19 Jan 2025 262nd elana-teal 884 59 10ms 20 Jun 2025 262nd dirckvdende 884 59 10ms 11 Jul 2025 262nd edsrzf 🇳🇿 884 59 30ms 27 Aug 2025 262nd Babafaba 884 59 29ms 7 Nov 2025 262nd Lv0Sys 🇵🇱 884 59 32ms 17 days ago 281st GrayJoKing 🇦🇺 884 74 8ms 23 Jul 2023 282nd DialFrost 🇸🇬 884 75 113ms 25 Mar 2025 283rd lyphyser 883 44 54ms 13 Jan 2024 284th btnlq 883 85 322ms 11 Mar 2023 284th stefangimmillaro 883 85 324ms 1 Apr 2023 286th lynn 883 95 1,346ms 17 Feb 2023 287th primo-ppcg 🇹🇭 882 41 47ms 25 Nov 2022 288th janbehrens 🇩🇪 882 56 9ms 21 Nov 2022 288th edsrzf 🇳🇿 882 56 9ms 27 Aug 2025 290th Lydxn 🇨🇦 882 98 24ms 27 Jun 2023 291st MeWhenI 🇻🇦 881 90 414ms 7 Nov 2025 292nd ovs-code 🇩🇪 881 100 9ms 31 Mar 2023 293rd janbehrens 🇩🇪 879 87 58ms 20 Nov 2022 293rd MeWhenI 🇻🇦 879 87 61ms 22 Jul 2024 295th Steffan153 🇫🇮 878 56 94ms 15 Aug 2024 296th janbehrens 🇩🇪 878 67 2ms 20 Nov 2022 296th GrayJoKing 🇦🇺 878 67 2ms 20 Feb 2023 296th inventshah 878 67 2ms 3 Feb 2024 296th MeWhenI 🇻🇦 878 67 2ms 22 Jul 2024 296th Alex-x90 🇺🇸 878 67 2ms 18 Oct 2025 301st MeWhenI 🇻🇦 878 75 98ms 8 Mar 2023 302nd GrayJoKing 🇦🇺 878 107 28ms 26 Jun 2023 303rd ovs-code 🇩🇪 877 98 124ms 21 Jun 2023 304th ovs-code 🇩🇪 876 83 445ms 23 Jul 2024 305th edsrzf 🇳🇿 875 50 739ms 22 Nov 2025 305th sean-niemann 🇺🇸 875 50 789ms 18 days ago 307th Steffan153 🇫🇮 874 96 1,327ms 10 Apr 2023 308th canissimia 🇦🇶 874 130 1,802ms 6 Mar 2023 309th HPWiz 🇳🇿 873 37 3ms 22 Nov 2022 310th dvargas46 🇺🇸 873 46 2ms 21 Nov 2022 310th DialFrost 🇸🇬 873 46 2ms 20 Nov 2025 312th bitsandbeyond 🇳🇱 873 47 233ms 5 Nov 2025 313th duckyluuk 🇳🇱 873 55 15ms 17 Dec 2024 313th DialFrost 🇸🇬 873 55 15ms 17 Dec 2024 315th primo-ppcg 🇹🇭 873 71 42ms 24 Nov 2022 315th Steffan153 🇫🇮 873 71 40ms 9 Apr 2023 317th GrayJoKing 🇦🇺 873 79 88ms 11 Dec 2022 318th janbehrens 🇩🇪 873 86 319ms 20 Nov 2022 318th tomtheisen 🇺🇸 873 86 309ms 4 Dec 2022 318th MeWhenI 🇻🇦 873 86 336ms 8 Dec 2022 First Prev 241–320 of 1,631 Next Last