The Calendar hole will go live in approximately 13 days. 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 481st DialFrost 🇸🇬 816 289 51ms 13 Aug 2025 481st frankgraziano 816 289 90ms 13 Oct 2025 483rd Shanethegamer 🇺🇸 815 76 144ms 12 Dec 2021 484th GrayJoKing 🇦🇺 814 103 14ms 30 Oct 2023 484th Shanethegamer 🇺🇸 814 103 11ms 22 Apr 2025 486th GrayJoKing 🇦🇺 814 111 21ms 3 Dec 2023 487th MeWhenI 🇻🇦 813 126 640ms 7 Nov 2025 488th dokutan 812 71 49ms 7 Apr 2025 489th jacklynnepenick 812 117 19ms 13 Aug 2021 489th plcc0 812 117 21ms 2 May 2025 491st DialFrost 🇸🇬 810 112 353ms 8 Oct 2024 492nd edsrzf 🇳🇿 809 75 38ms 22 Jul 2025 493rd MeWhenI 🇻🇦 807 105 3ms 5 Jul 2024 494th sean-niemann 🇺🇸 807 141 146ms 31 Oct 2023 495th MeWhenI 🇻🇦 807 200 1,774ms 7 Nov 2025 496th emgordon154 806 111 2,746ms 13 Dec 2024 497th DialFrost 🇸🇬 805 100 403ms 19 Aug 2025 498th lifthrasiir 🇰🇷 805 118 40ms 20 Nov 2024 498th CommandLeo 🇮🇹 805 118 218ms 26 days ago 500th DialFrost 🇸🇬 804 98 35ms 28 Jul 2024 501st typeswitch-dev 🇵🇹 804 126 7ms 6 Jul 2024 502nd KatieLG 🇬🇧 803 98 456ms 8 Oct 2025 503rd MeWhenI 🇻🇦 803 113 384ms 15 Nov 2022 503rd sean-niemann 🇺🇸 803 113 355ms 8 Oct 2024 505th Irratix 🇳🇱 800 95 14ms 22 Mar 2022 505th KatieLG 🇬🇧 800 95 15ms 16 Nov 2023 507th stefangimmillaro 800 128 492ms 6 Oct 2025 508th MeWhenI 🇻🇦 800 152 43ms 17 May 2023 509th lynn 799 47 6ms 10 Jan 2022 510th DialFrost 🇸🇬 799 106 3ms 12 Feb 2024 511th bzijlema 🇳🇱 799 119 19ms 3 Jul 2024 511th snoozingnewt 🇨🇦 799 119 196ms 5 days ago 513th DialFrost 🇸🇬 798 129 91ms 5 Jun 2024 514th lynn 798 159 33ms 21 Jul 2023 515th MeWhenI 🇻🇦 796 45 140ms 28 Jul 2022 516th Shanethegamer 🇺🇸 796 114 375ms 30 Oct 2023 517th FlorianCassayre 🇫🇷 795 44 208ms 26 May 2024 518th scpchicken 🇵🇼 794 78 218ms 4 May 2022 519th sean-niemann 🇺🇸 794 126 44ms 5 May 2023 520th Yewzir 🇧🇪 794 129 680ms 24 Sep 2025 521st rucin93 🇵🇱 793 118 36ms 11 days ago 522nd vezzick 792 120 20ms 5 Mar 2021 523rd MeWhenI 🇻🇦 789 117 147ms 17 Nov 2022 524th MeWhenI 🇻🇦 788 100 19ms 28 May 2023 525th MeWhenI 🇻🇦 788 118 463ms 4 Mar 2022 526th ZakkkkAttackkkk 🇵🇭 785 121 21ms 26 Aug 2023 527th Shanethegamer 🇺🇸 784 74 6ms 6 Jan 2022 528th wiz0u 781 103 423ms 18 Aug 2025 529th janbehrens 🇩🇪 779 78 956ms 3 Dec 2023 530th SirBogman 🇺🇸 779 101 561ms 20 Jan 2024 531st OllieBoyne 🇬🇧 779 122 22ms 3 Jun 2021 531st Emutis 🇱🇹 779 122 20ms 17 Sep 2025 533rd MeWhenI 🇻🇦 778 303 43ms 21 Apr 2025 534th Steffan153 🇫🇮 776 103 31ms 14 Feb 2024 535th CaedenHarper 🇨🇦 776 132 538ms 3 Oct 2025 536th m-tkach 🇺🇦 774 133 677ms 14 Aug 2023 536th michaelmoynihan 774 133 486ms 27 Aug 2025 538th DialFrost 🇸🇬 773 121 10ms 7 Nov 2023 539th rowechenzhong 773 123 18ms 25 Mar 2020 539th giacomogallina 773 123 20ms 21 May 2020 539th MichalMarsalek 🇨🇿 773 123 20ms 9 Oct 2022 539th qpwoeirut 773 123 27ms 20 Nov 2025 543rd Yewzir 🇧🇪 773 139 5ms 9 Jun 2024 544th namelessiw 770 133 667ms 8 Oct 2025 545th Shanethegamer 🇺🇸 769 79 568ms 31 Oct 2023 545th dcgjb 769 79 650ms 16 May 2024 547th SirBogman 🇺🇸 766 49 6ms 16 Nov 2023 548th MeWhenI 🇻🇦 766 105 151ms 3 Aug 2024 549th primo-ppcg 🇹🇭 766 107 93ms 12 Feb 2022 550th CaedenHarper 🇨🇦 764 83 957ms 18 Aug 2025 551st CaedenHarper 🇨🇦 764 149 155ms 22 Aug 2025 552nd janbehrens 🇩🇪 763 122 472ms 18 May 2023 553rd CaedenHarper 🇨🇦 762 119 365ms 18 Aug 2025 554th sean-niemann 🇺🇸 761 81 745ms 7 May 2022 555th Yewzir 🇧🇪 760 100 13ms 9 Jun 2024 556th davecame 760 125 22ms 14 Sep 2023 557th ovs-code 🇩🇪 760 128 19ms 4 Feb 2023 558th primo-ppcg 🇹🇭 760 130 105ms 14 Feb 2020 559th primo-ppcg 🇹🇭 759 106 383ms 10 Apr 2025 560th MeWhenI 🇻🇦 758 108 58ms 30 Oct 2023 First Prev 481–560 of 1,453 Next Last