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 479th nwellnhof 🇩🇪 829 39 3ms 15 Jul 2023 482nd GrayJoKing 🇦🇺 829 73 4ms 3 Dec 2022 483rd guilhem-roy 🇫🇷 828 63 35ms 21 Nov 2022 483rd jakobkordez 🇸🇮 828 63 11ms 22 Nov 2022 483rd nstearns96 🇬🇧 828 63 31ms 6 Jan 2023 483rd Tess2662 828 63 10ms 4 Mar 2023 483rd 051 🇸🇬 828 63 15ms 24 Dec 2023 483rd lhulinsky 828 63 34ms 23 Oct 2024 483rd croc54 828 63 46ms 8 Jan 2025 483rd andrewjc2000 828 63 36ms 29 Jul 2025 483rd KasperKivimaeki 🇫🇮 828 63 29ms 25 Oct 2025 492nd RYNO8 828 71 2ms 4 Sep 2023 493rd edsrzf 🇳🇿 826 90 56ms 10 Feb 2025 493rd kg583 🇺🇸 826 90 56ms 27 Aug 2025 495th ovs-code 🇩🇪 825 67 3ms 9 Oct 2023 496th Emutis 🇱🇹 825 91 396ms 16 Aug 2025 497th coreynash 823 60 10ms 19 Oct 2023 497th helbling 🇨🇭 823 60 10ms 13 Mar 2024 499th emplv 🇱🇻 823 105 25ms 21 Nov 2022 500th Natanaelel 🇸🇪 822 38 129ms 20 Feb 2023 501st sisyphus-ppcg 🇦🇺 821 44 36ms 22 Nov 2022 502nd Shanethegamer 🇺🇸 821 79 98ms 22 Nov 2022 503rd GrayJoKing 🇦🇺 820 49 6ms 21 Nov 2022 503rd DialFrost 🇸🇬 820 49 6ms 24 May 2025 505th DialFrost 🇸🇬 820 79 175ms 8 Aug 2024 505th Natanaelel 🇸🇪 820 79 168ms 31 May 2025 507th MeWhenI 🇻🇦 820 168 1,682ms 7 Nov 2025 508th Shanethegamer 🇺🇸 819 105 118ms 22 Nov 2022 508th mousetail 🇳🇱 819 105 129ms 12 Jan 2024 510th Shanethegamer 🇺🇸 819 116 271ms 20 Nov 2022 510th KasperKivimaeki 🇫🇮 819 116 255ms 3 Oct 2025 512th MeWhenI 🇻🇦 819 171 473ms 30 Mar 2025 513th sean-niemann 🇺🇸 817 52 129ms 8 Jan 2025 514th clockworknazo 817 76 2ms 23 Nov 2022 515th Shanethegamer 🇺🇸 816 47 1,081ms 21 Nov 2022 516th ovs-code 🇩🇪 816 169 1,739ms 14 Sep 2025 517th FlorianCassayre 🇫🇷 815 64 39ms 6 Jan 2023 517th CedricGebistorf 815 64 36ms 4 May 2023 517th cros107 🇦🇺 815 64 35ms 5 Oct 2023 517th logvp 815 64 31ms 3 Jan 2024 517th namelessiw 815 64 32ms 10 Jan 2024 517th jmfk 815 64 40ms 5 Apr 2024 517th hiichbindermax 815 64 36ms 4 Sep 2024 524th MeWhenI 🇻🇦 815 81 120ms 23 Nov 2022 525th janbehrens 🇩🇪 813 46 147ms 20 Nov 2022 526th bac0id 813 94 58ms 23 Feb 2024 527th antimon2 🇯🇵 812 61 2,039ms 20 Nov 2022 527th commandblockguy 🇺🇸 812 61 377ms 15 Jan 2024 527th Shanethegamer 🇺🇸 812 61 342ms 16 Jan 2024 527th KatieLG 🇬🇧 812 61 359ms 19 Oct 2025 531st edsrzf 🇳🇿 811 106 130ms 16 Nov 2024 532nd CaedenHarper 🇨🇦 810 54 757ms 6 Sep 2025 533rd SirBogman 🇺🇸 809 179 12ms 22 Nov 2022 534th Lydxn 🇨🇦 808 40 6ms 24 Jun 2023 535th edsrzf 🇳🇿 807 75 4ms 10 Nov 2025 536th pandapawskat 806 73 2ms 6 Dec 2022 536th elgan65536 806 73 2ms 5 Mar 2024 536th blaztoma 🇱🇹 806 73 2ms 16 Aug 2025 536th Emutis 🇱🇹 806 73 2ms 16 Aug 2025 540th snyderek 🇺🇸 806 77 2ms 19 Jan 2025 541st marshallward 🇺🇸 805 82 39ms 20 Jun 2023 541st stefangimmillaro 805 82 3,234ms 7 Nov 2024 543rd CaedenHarper 🇨🇦 805 118 269ms 4 Nov 2025 544th janlelis 803 45 34ms 8 Dec 2023 544th DialFrost 🇸🇬 803 45 42ms 2 Aug 2024 544th snoozingnewt 🇨🇦 803 45 40ms 10 Oct 2025 544th emgordon154 803 45 47ms 17 Nov 2025 548th Shanethegamer 🇺🇸 803 50 2ms 19 Nov 2022 548th MeWhenI 🇻🇦 803 50 6ms 29 May 2023 550th luuumine 🇫🇷 803 107 124ms 17 Nov 2025 551st mrnomm 802 65 16ms 6 Apr 2023 551st suwat513 802 65 37ms 19 Jun 2023 551st 2011-Chan-Ethan 802 65 38ms 10 Jul 2023 551st neihousaigaai 802 65 14ms 13 Feb 2024 551st Stockoh 🇫🇷 802 65 38ms 26 Apr 2024 551st CLOStrophobic 🇮🇹 802 65 10ms 31 Jan 2025 551st TheZwierzLF 🇵🇱 802 65 34ms 27 May 2025 551st Bmrl7 802 65 14ms 28 hours ago 559th ovs-code 🇩🇪 801 39 310ms 30 Dec 2023 560th rucin93 🇵🇱 801 53 133ms 6 Dec 2024 First Prev 481–560 of 1,631 Next Last