The Calendar hole will go live in approximately 27 hours. Why not try and solve it ahead of time?
Roman to Arabic 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 880th Papushkado 583 163 19ms 10 Nov 2025 882nd emgordon154 583 336 661ms 6 Nov 2025 883rd PaulTaykalo 581 170 108ms 24 Sep 2020 884th p01 580 131 14ms 7 Feb 2018 884th Florian-Mt 580 131 16ms 23 Oct 2023 886th CaedenHarper 🇨🇦 580 136 10ms 22 Aug 2025 887th wrhm 580 164 23ms 12 Dec 2020 887th zlee1 580 164 21ms 30 Apr 2021 887th hymanimy 580 164 22ms 8 Jan 2022 890th phdphil 579 107 193ms 22 Apr 2018 891st djeedjay 🇳🇱 577 147 3ms 6 Sep 2021 892nd DanielRHolland 577 194 359ms 12 Nov 2020 893rd Bodo171 576 165 18ms 5 Dec 2022 894th Yewzir 🇧🇪 575 139 109ms 9 Jun 2024 895th markus-rekdal 573 166 17ms 28 May 2019 895th ay2718 573 166 20ms 17 Jul 2019 895th andre-lameirinhas 🇵🇹 573 166 21ms 4 Sep 2020 895th kenny14231 573 166 18ms 5 Aug 2022 895th KiwiLT 573 166 19ms 22 Nov 2022 895th FlorianCassayre 🇫🇷 573 166 22ms 29 Jan 2023 895th AdamMorris377 573 166 18ms 7 Sep 2024 902nd DaCuteRaccoon 572 133 14ms 8 Dec 2022 903rd CaedenHarper 🇨🇦 571 173 650ms 22 Aug 2025 904th Sciman101 570 158 6ms 16 May 2023 905th BrenSchaap 569 167 19ms 21 Oct 2021 905th petroselo 569 167 18ms 29 Dec 2021 907th CaedenHarper 🇨🇦 569 181 64ms 16 Nov 2025 908th annaproxy 568 197 327ms 23 Feb 2023 909th cingulataluke 566 168 20ms 30 Aug 2023 909th RaBa21 🇭🇺 566 168 18ms 12 Jul 2025 911th Jacob385 566 181 568ms 28 Oct 2025 912th melven 566 215 42ms 16 Oct 2025 913th XenThe 🇬🇧 563 135 12ms 12 Jun 2025 914th CaedenHarper 🇨🇦 562 141 3,196ms 17 Aug 2025 915th TheAristos 562 169 20ms 1 Nov 2019 915th mishak-sys 562 169 19ms 9 Sep 2025 917th BambooleanLogic 🇸🇪 559 136 22ms 3 Nov 2022 918th itiievskyi 🇺🇦 559 170 18ms 10 Aug 2020 918th glesnick 559 170 19ms 6 Oct 2022 918th SB-945 559 170 29ms 7 Apr 2024 918th ziselsberger 559 170 28ms 7 Oct 2024 918th croc54 559 170 19ms 13 Jan 2025 923rd emgordon154 558 104 7ms 26 Jul 2024 924th emgordon154 557 221 112ms 10 Jun 2025 925th AkashTandon167 556 171 20ms 21 Nov 2020 925th cros107 🇦🇺 556 171 26ms 14 Feb 2024 927th kkoenig 555 228 285ms 13 Sep 2024 928th amollberg 🇸🇪 553 172 26ms 16 Feb 2022 928th mbittner20 553 172 20ms 27 May 2023 928th CutSandstone 553 172 32ms 7 Jul 2024 931st uttumuttu 🇫🇮 551 138 16ms 5 Jan 2022 931st KaleChips22 551 138 13ms 3 Aug 2025 933rd Waffle3z 549 105 92ms 22 Jan 2021 934th ludwig-n 549 173 20ms 4 Apr 2020 934th CodeAltF4 549 173 20ms 8 Mar 2022 934th myleopard 549 173 19ms 23 Dec 2022 937th ShiraJoseph 🇺🇸 547 139 16ms 25 Jun 2023 938th HumanoidCPU 547 144 694ms 7 Jun 2024 939th UnderKoen 🇳🇱 547 225 117ms 8 Jul 2024 940th ehulinsky 🇺🇸 546 174 20ms 8 May 2023 940th keelimeguy 🇺🇸 546 174 23ms 17 May 2025 940th Code-Coder-coder 546 174 20ms 12 Oct 2025 943rd mckymsh 543 140 14ms 1 Mar 2022 944th IISResetMe 542 112 723ms 8 Mar 2024 944th CaedenHarper 🇨🇦 542 112 283ms 22 Aug 2025 946th andrewteske 540 176 23ms 28 Nov 2021 946th sciencejiho 540 176 17ms 26 Sep 2024 948th olivermrose 🇺🇸 539 107 73ms 24 Oct 2021 949th nephila-nacrea 🇬🇧 537 108 26ms 17 Jan 2018 950th Pale-Vessel 537 177 22ms 18 Dec 2023 951st blaztoma 🇱🇹 535 174 191ms 9 Nov 2025 952nd hrrs01 534 108 67ms 29 Jan 2018 953rd lrustand 534 178 21ms 15 Jan 2018 953rd alangodfrey 534 178 22ms 7 Feb 2019 953rd richard-oelze 🇩🇪 534 178 21ms 7 Mar 2021 953rd robin-scragg 534 178 20ms 24 Aug 2025 957th albanian-laundromat 533 122 1,066ms 13 Nov 2025 958th xkacer 🇨🇿 532 143 15ms 25 Jan 2021 958th trinityy-7 532 143 15ms 17 Mar 2024 960th elgan65536 532 214 184ms 27 Mar 2024 First Prev 881–960 of 1,460 Next Last