The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Arabic to Roman in all languages in chars. 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 Chars Time Submitted 401st FlorianCassayre 🇫🇷 782 51 141ms 26 May 2024 402nd jacklynnepenick 782 110 25ms 14 Aug 2021 402nd Yewzir 🇧🇪 782 110 26ms 3 Jun 2024 402nd HumanoidCPU 782 110 26ms 31 Oct 2024 402nd keelimeguy 🇺🇸 782 110 59ms 17 May 2025 406th primo-ppcg 🇹🇭 782 152 430ms 21 Nov 2021 407th MeWhenI 🇻🇦 782 186 6ms 24 Jul 2023 408th Shanethegamer 🇺🇸 782 193 129ms 28 Jan 2024 409th stefangimmillaro 782 195 51ms 26 Apr 2025 410th scpchicken 🇵🇼 780 100 66ms 17 Apr 2022 411th Kacarott 🇦🇺 779 70 47ms 22 Aug 2024 412th prplz 🇦🇺 779 131 9ms 19 Apr 2021 413th primo-ppcg 🇹🇭 779 137 16ms 18 May 2023 414th JayXon 🇺🇸 779 146 486ms 5 Mar 2022 415th laikoni 779 187 355ms 10 Jan 2019 416th xsot 🇸🇬 778 149 15ms 10 Oct 2023 417th FortuiteMan 🇫🇷 777 62 15ms 7 Oct 2024 418th KatieLG 🇬🇧 777 112 15ms 5 Oct 2025 419th xsot 🇸🇬 777 127 20ms 19 Apr 2025 420th MeWhenI 🇻🇦 776 160 115ms 1 Feb 2024 421st MeWhenI 🇻🇦 776 339 710ms 10 Feb 2025 422nd MeWhenI 🇻🇦 775 111 28ms 22 Oct 2021 423rd Jeremy-Stafford 775 188 361ms 29 Mar 2023 424th m-tkach 🇺🇦 774 210 31ms 12 Jan 2024 425th DialFrost 🇸🇬 772 153 24ms 16 Apr 2025 425th edsrzf 🇳🇿 772 153 23ms 1 Sep 2025 427th tomtheisen 🇺🇸 772 154 427ms 1 Feb 2023 428th UnderKoen 🇳🇱 772 223 187ms 8 Jul 2024 429th RussellEmerine 771 189 328ms 2 Jan 2020 430th stefangimmillaro 771 213 170ms 4 Jun 2025 431st emgordon154 770 113 19ms 1 Aug 2024 432nd prplz 🇦🇺 770 175 2,853ms 9 Jan 2022 433rd dokutan 769 115 1,290ms 8 Sep 2025 433rd albanian-laundromat 769 115 1,281ms 12 Nov 2025 435th dokutan 767 52 113ms 6 Apr 2025 436th inventshah 766 149 4,485ms 26 Oct 2024 437th Shanethegamer 🇺🇸 766 189 531ms 24 Sep 2025 438th snoozingnewt 🇨🇦 765 180 110ms 6 days ago 439th RyanMHsiao 765 287 1,777ms 25 Sep 2024 440th ETHproductions 🇺🇸 763 114 14ms 23 May 2018 440th vlpx 🇫🇮 763 114 21ms 23 Sep 2024 442nd DialFrost 🇸🇬 763 149 493ms 15 Apr 2025 443rd Babafaba 762 113 29ms 25 days ago 444th AdrienHache 🇫🇷 762 156 420ms 24 Dec 2023 445th Shanethegamer 🇺🇸 762 163 115ms 28 Jan 2024 446th MeWhenI 🇻🇦 762 326 104ms 19 Jul 2025 447th GrayJoKing 🇦🇺 760 163 395ms 24 Jul 2025 448th sean-niemann 🇺🇸 759 130 22ms 30 May 2025 449th lifthrasiir 🇰🇷 757 72 49ms 30 Nov 2024 450th solmyr2000 757 178 555ms 19 Jun 2022 451st southpolenator 756 135 10ms 12 Jun 2023 452nd jmerle 🇳🇱 755 114 22ms 20 Jun 2023 452nd SB-945 755 114 27ms 3 Mar 2024 452nd dokutan 755 114 28ms 8 Sep 2025 455th marcin7Cd 755 193 361ms 24 Jan 2021 456th DialFrost 🇸🇬 755 200 561ms 16 Apr 2025 457th SirBogman 🇺🇸 755 202 47ms 16 Apr 2022 458th GolfingSuccess 🇬🇷 754 88 135ms 14 Feb 2025 459th sisyphus-ppcg 🇦🇺 753 54 149ms 28 Jul 2022 459th ovs-code 🇩🇪 753 54 122ms 10 Feb 2025 461st edsrzf 🇳🇿 753 218 226ms 22 Jul 2025 462nd Alex-x90 🇺🇸 752 179 529ms 25 Oct 2023 463rd lynn 752 216 179ms 17 Jul 2023 464th duckyluuk 🇳🇱 751 104 1,224ms 7 Jul 2025 465th KrausRaus 🇺🇸 750 116 17ms 2 Sep 2020 466th QuincyNash 🇺🇸 748 115 433ms 4 Dec 2022 467th edsrzf 🇳🇿 748 155 10ms 4 Jul 2025 468th prplz 🇦🇺 748 159 396ms 21 Nov 2021 469th snoozingnewt 🇨🇦 748 202 108ms 20 Nov 2025 470th Steffan153 🇫🇮 747 132 23ms 8 Aug 2024 471st DialFrost 🇸🇬 746 194 535ms 24 Sep 2025 472nd KatieLG 🇬🇧 744 105 409ms 6 Oct 2025 473rd iakolzin 744 181 577ms 30 Jun 2022 474th Steffan153 🇫🇮 743 117 13ms 26 Jul 2024 474th xyangst 743 117 14ms 28 Sep 2024 474th ArmaanAS 743 117 17ms 18 Feb 2025 477th Yewzir 🇧🇪 743 159 17ms 16 Oct 2023 478th MeWhenI 🇻🇦 743 160 399ms 16 Jun 2023 479th o0lit3 🇺🇸 742 62 9ms 6 Oct 2020 479th JayXon 🇺🇸 742 62 9ms 16 Dec 2021 First Prev 401–480 of 1,859 Next Last