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 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 238th lynn 887 73 168ms 27 Jan 2023 238th Steffan153 🇫🇮 887 73 171ms 20 Feb 2023 238th jared-hughes 887 73 165ms 13 Sep 2023 244th JayXon 🇺🇸 887 82 464ms 22 Nov 2022 244th Steffan153 🇫🇮 887 82 428ms 14 Aug 2024 244th sean-niemann 🇺🇸 887 82 376ms 9 May 2025 247th canissimia 🇦🇶 887 192 3ms 7 Dec 2022 248th acotis 886 97 132ms 31 Mar 2025 249th m-tkach 🇺🇦 886 106 28ms 18 Jan 2024 249th Steffan153 🇫🇮 886 106 28ms 27 Aug 2024 251st GrayJoKing 🇦🇺 885 48 128ms 13 Aug 2024 251st emplv 🇱🇻 885 48 125ms 1 Nov 2024 253rd GrayJoKing 🇦🇺 885 67 283ms 22 Aug 2023 254th GrayJoKing 🇦🇺 885 83 309ms 26 Jun 2023 254th JayXon 🇺🇸 885 83 313ms 27 Jun 2023 256th zacjl 885 84 53ms 14 Feb 2025 257th JayXon 🇺🇸 884 56 356ms 21 Jan 2024 257th Steffan153 🇫🇮 884 56 457ms 15 Aug 2024 257th bizy-coder 884 56 382ms 1 Sep 2024 257th kg583 🇺🇸 884 56 358ms 22 Dec 2024 261st andersk 🇺🇸 884 59 34ms 20 Nov 2022 261st bricknellj 884 59 29ms 1 Dec 2022 261st neel11235813 884 59 32ms 22 Feb 2023 261st btjones0 884 59 33ms 23 Feb 2023 261st gabrielsqw 884 59 11ms 17 Apr 2023 261st RYNO8 884 59 10ms 4 Sep 2023 261st inventshah 884 59 11ms 22 Jan 2024 261st davecame 884 59 31ms 14 Mar 2024 261st duckyluuk 🇳🇱 884 59 32ms 26 May 2024 261st Bulmenisaurus 884 59 30ms 22 Oct 2024 261st snydej 884 59 10ms 21 Nov 2024 261st lifthrasiir 🇰🇷 884 59 21ms 3 Dec 2024 261st CaedenHarper 🇨🇦 884 59 30ms 30 Dec 2024 261st ryyyn 🇺🇸 884 59 30ms 19 Jan 2025 261st elana-teal 884 59 10ms 20 Jun 2025 261st dirckvdende 884 59 10ms 11 Jul 2025 261st edsrzf 🇳🇿 884 59 30ms 27 Aug 2025 261st Babafaba 884 59 29ms 7 Nov 2025 261st Lv0Sys 🇵🇱 884 59 32ms 10 days ago 280th GrayJoKing 🇦🇺 884 74 8ms 23 Jul 2023 281st DialFrost 🇸🇬 884 75 113ms 25 Mar 2025 282nd lyphyser 883 44 54ms 13 Jan 2024 283rd btnlq 883 85 322ms 11 Mar 2023 283rd stefangimmillaro 883 85 324ms 1 Apr 2023 285th lynn 883 95 1,346ms 17 Feb 2023 286th primo-ppcg 🇹🇭 882 41 58ms 25 Nov 2022 287th janbehrens 🇩🇪 882 56 9ms 21 Nov 2022 287th edsrzf 🇳🇿 882 56 9ms 27 Aug 2025 289th Lydxn 🇨🇦 882 98 24ms 27 Jun 2023 290th MeWhenI 🇻🇦 881 90 414ms 7 Nov 2025 291st ovs-code 🇩🇪 881 100 9ms 31 Mar 2023 292nd janbehrens 🇩🇪 879 87 79ms 20 Nov 2022 292nd MeWhenI 🇻🇦 879 87 73ms 22 Jul 2024 294th Steffan153 🇫🇮 878 56 94ms 15 Aug 2024 295th janbehrens 🇩🇪 878 67 2ms 20 Nov 2022 295th GrayJoKing 🇦🇺 878 67 2ms 20 Feb 2023 295th inventshah 878 67 2ms 3 Feb 2024 295th MeWhenI 🇻🇦 878 67 2ms 22 Jul 2024 295th Alex-x90 🇺🇸 878 67 2ms 18 Oct 2025 300th MeWhenI 🇻🇦 878 75 98ms 8 Mar 2023 301st GrayJoKing 🇦🇺 878 107 28ms 26 Jun 2023 302nd ovs-code 🇩🇪 877 98 124ms 21 Jun 2023 303rd ovs-code 🇩🇪 876 83 445ms 23 Jul 2024 304th edsrzf 🇳🇿 875 50 739ms 26 days ago 304th sean-niemann 🇺🇸 875 50 789ms 12 days ago 306th Steffan153 🇫🇮 874 96 1,327ms 10 Apr 2023 307th canissimia 🇦🇶 874 130 1,802ms 6 Mar 2023 308th HPWiz 🇳🇿 873 37 3ms 22 Nov 2022 309th dvargas46 🇺🇸 873 46 2ms 21 Nov 2022 309th DialFrost 🇸🇬 873 46 2ms 27 days ago 311th bitsandbeyond 🇳🇱 873 47 266ms 5 Nov 2025 312th duckyluuk 🇳🇱 873 55 15ms 17 Dec 2024 312th DialFrost 🇸🇬 873 55 15ms 17 Dec 2024 314th primo-ppcg 🇹🇭 873 71 42ms 24 Nov 2022 314th Steffan153 🇫🇮 873 71 40ms 9 Apr 2023 316th GrayJoKing 🇦🇺 873 79 88ms 11 Dec 2022 317th janbehrens 🇩🇪 873 86 319ms 20 Nov 2022 317th tomtheisen 🇺🇸 873 86 309ms 4 Dec 2022 317th MeWhenI 🇻🇦 873 86 336ms 8 Dec 2022 317th annaproxy 873 86 314ms 11 Dec 2022 First Prev 241–320 of 1,628 Next Last