The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
DFA Simulator 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 160th kg583 🇺🇸 840 150 521ms 10 May 2025 162nd edsrzf 🇳🇿 840 239 212ms 20 Jul 2025 163rd lyphyser 839 179 2ms 1 Nov 2023 164th Shanethegamer 🇺🇸 838 251 41ms 28 Sep 2024 165th albanian-laundromat 837 168 11ms 16 Sep 2025 165th blaztoma 🇱🇹 837 168 15ms 3 days ago 167th lynn 837 196 158ms 8 Jan 2025 168th edsrzf 🇳🇿 837 235 120ms 14 days ago 169th Yax42 🇫🇷 836 172 422ms 15 Apr 2025 170th Kacarott 🇦🇺 836 174 68ms 12 days ago 171st kg583 🇺🇸 836 240 54ms 20 Jul 2025 172nd ovs-code 🇩🇪 835 148 17ms 27 Oct 2024 173rd GolfingSuccess 🇬🇷 835 151 475ms 20 Jan 2024 173rd MichalMarsalek 🇨🇿 835 151 496ms 21 Jan 2024 175th stefangimmillaro 834 111 62ms 6 Nov 2023 176th voytxt 🇨🇿 834 137 10ms 13 Jul 2025 177th typeswitch-dev 🇵🇹 834 216 13ms 23 Aug 2025 178th MeWhenI 🇻🇦 833 130 1,039ms 15 Apr 2025 179th janbehrens 🇩🇪 832 169 12ms 30 Nov 2023 179th InigoK 🇺🇸 832 169 10ms 11 Sep 2025 181st MarcMush 🇫🇷 831 146 668ms 13 Jan 2024 182nd stefangimmillaro 831 236 42ms 4 Jun 2025 183rd janbehrens 🇩🇪 830 181 5ms 22 Dec 2023 184th CLOStrophobic 🇮🇹 830 224 36ms 24 Feb 2025 185th MeWhenI 🇻🇦 830 233 41ms 13 Jul 2024 186th jaredtrh 827 170 11ms 2 Nov 2023 187th Shanethegamer 🇺🇸 827 190 126ms 24 May 2025 188th revlayle 🇺🇸 826 174 373ms 20 Apr 2024 189th MeWhenI 🇻🇦 825 179 51ms 13 Jan 2025 190th Shanethegamer 🇺🇸 825 206 2,662ms 7 Nov 2023 191st GrayJoKing 🇦🇺 825 208 158ms 8 Nov 2023 192nd AlephSquirrel 824 153 489ms 22 Jan 2024 193rd lyphyser 824 254 256ms 1 Nov 2023 194th KrausRaus 🇺🇸 822 139 10ms 2 Nov 2023 195th Shanethegamer 🇺🇸 822 252 256ms 6 Nov 2023 196th edsrzf 🇳🇿 821 183 5ms 28 Jun 2025 197th neel11235813 818 154 504ms 1 Apr 2024 198th jeff-at-tamer-dot-codes 🇺🇸 818 172 12ms 3 Nov 2023 198th lifthrasiir 🇰🇷 818 172 11ms 14 Nov 2024 198th guilhem-roy 🇫🇷 818 172 11ms 29 May 2025 201st targrik 817 184 4ms 16 May 2025 202nd m-tkach 🇺🇦 817 302 65ms 1 Nov 2023 203rd MeWhenI 🇻🇦 816 219 56ms 4 Dec 2023 204th stefangimmillaro 815 233 581ms 6 Oct 2025 205th UnderKoen 🇳🇱 815 319 13ms 20 Jan 2025 206th edsrzf 🇳🇿 812 173 3ms 28 Aug 2025 207th MeWhenI 🇻🇦 812 339 1,648ms 7 Nov 2025 208th mwoghiren 🇨🇦 811 141 10ms 5 Nov 2023 209th emgordon154 811 146 141ms 24 Nov 2024 210th Shanethegamer 🇺🇸 808 156 498ms 16 Jan 2024 210th snoozingnewt 🇨🇦 808 156 594ms 15 days ago 212th KasperKivimaeki 🇫🇮 808 174 36ms 20 days ago 213th emgordon154 806 400 513ms 4 Oct 2025 214th Natanaelel 🇸🇪 805 115 63ms 1 Nov 2023 215th janbehrens 🇩🇪 805 142 11ms 22 Dec 2023 216th SirBogman 🇺🇸 800 106 33ms 5 Nov 2023 217th edsrzf 🇳🇿 800 259 269ms 27 Jun 2025 218th tayloia 🇬🇧 799 143 9ms 3 Nov 2023 219th hellwue 799 176 10ms 9 Nov 2023 220th Natanaelel 🇸🇪 796 80 3ms 10 Nov 2023 221st ahmetdemirag 🇨🇾 795 177 11ms 20 Jun 2024 222nd canissimia 🇦🇶 795 324 1,225ms 27 Dec 2023 223rd emgordon154 794 186 8ms 22 May 2025 224th stefangimmillaro 793 176 102ms 5 Nov 2023 225th MeWhenI 🇻🇦 793 336 362ms 28 Mar 2024 226th saito-ta 🇯🇵 791 136 270ms 2 Nov 2023 227th emgordon154 791 202 9ms 22 May 2025 228th Alex-x90 🇺🇸 790 178 14ms 6 Nov 2023 229th snyderek 🇺🇸 790 215 95ms 21 Jun 2025 230th stefangimmillaro 790 265 179ms 29 Aug 2024 231st Shanethegamer 🇺🇸 790 408 534ms 24 Apr 2025 232nd lifthrasiir 🇰🇷 788 160 562ms 2 Dec 2024 233rd jared-hughes 787 396 57ms 18 Aug 2024 234th ndren 786 179 90ms 8 Nov 2023 234th inventshah 786 179 11ms 3 Dec 2023 236th olleicua 🇺🇸 783 146 10ms 3 Feb 2024 236th emgordon154 783 146 10ms 24 Nov 2024 238th albanian-laundromat 783 161 721ms 4 Aug 2025 239th cros107 🇦🇺 781 180 14ms 2 Nov 2023 239th wyarde 781 180 10ms 2 Nov 2023 First Prev 161–240 of 503 Next Last