The Calendar hole will go live in approximately 13 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 321st snoozingnewt 🇨🇦 684 303 319ms 18 Oct 2025 322nd Pyroan 683 206 11ms 12 Mar 2025 323rd Shanethegamer 🇺🇸 680 217 6ms 12 Nov 2023 324th Natanaelel 🇸🇪 678 242 162ms 19 May 2024 325th kkoenig 677 306 267ms 7 Sep 2025 326th nwellnhof 🇩🇪 672 160 206ms 1 Nov 2023 327th stefangimmillaro 672 214 386ms 5 Nov 2023 328th snoozingnewt 🇨🇦 668 239 98ms 18 Oct 2025 329th hiichbindermax 667 211 10ms 20 Nov 2023 329th thienudomsrirungruang 667 211 11ms 1 Apr 2024 331st two-bad 🇬🇧 665 172 10ms 25 Feb 2024 332nd alexsave 661 173 10ms 13 Nov 2025 333rd scpchicken 🇵🇼 660 130 49ms 1 Nov 2023 334th YAJUE114514 660 213 11ms 8 days ago 335th MeWhenI 🇻🇦 659 234 5ms 4 Dec 2023 336th emgordon154 659 418 1,620ms 8 Nov 2025 337th Natanaelel 🇸🇪 657 129 36ms 1 Nov 2023 338th snoozingnewt 🇨🇦 656 319 228ms 25 days ago 339th VictorFordham 654 215 12ms 24 Nov 2023 340th MeWhenI 🇻🇦 652 184 58ms 15 Jul 2025 341st elgan65536 650 322 212ms 11 Apr 2024 342nd keelimeguy 🇺🇸 648 217 59ms 16 Nov 2023 343rd CaedenHarper 🇨🇦 645 218 18ms 21 Sep 2025 344th edsrzf 🇳🇿 644 325 308ms 23 Jun 2025 345th tatzyr 🇯🇵 643 144 35ms 21 Feb 2025 346th LukeBridges 🇬🇧 642 178 11ms 14 Aug 2024 347th KatieLG 🇬🇧 640 197 698ms 19 Apr 2025 348th janbehrens 🇩🇪 639 190 453ms 9 Jan 2024 349th amollberg 🇸🇪 639 220 11ms 14 Jan 2024 350th stefangimmillaro 629 216 4,624ms 12 Nov 2024 351st weliveinhell 🇭🇹 628 182 10ms 1 Nov 2023 352nd MeWhenI 🇻🇦 628 393 61ms 24 Jun 2024 353rd MeWhenI 🇻🇦 627 189 142ms 3 Aug 2024 354th lukegustafson 🇺🇸 621 184 9ms 8 Mar 2024 355th MeWhenI 🇻🇦 621 242 2ms 3 Sep 2024 356th Shanethegamer 🇺🇸 619 227 4ms 1 Nov 2023 357th GolfingSuccess 🇬🇷 618 200 24ms 20 Aug 2024 358th snoozingnewt 🇨🇦 618 220 3,673ms 18 Oct 2025 359th snoozingnewt 🇨🇦 618 243 5ms 18 Oct 2025 360th janbehrens 🇩🇪 618 307 439ms 22 Dec 2023 361st annaproxy 617 266 161ms 6 Nov 2023 362nd jtaxen 611 230 11ms 8 Jun 2024 362nd luuumine 🇫🇷 611 230 13ms 29 Oct 2025 364th Shanethegamer 🇺🇸 611 304 55ms 30 Aug 2024 365th jared-hughes 608 247 2ms 18 Aug 2024 366th alemelis 607 200 1,474ms 20 Sep 2024 367th alemelis 601 234 31ms 11 Oct 2024 368th Mandrzejy 🇵🇱 600 283 110ms 8 Jul 2024 369th MeWhenI 🇻🇦 598 180 141ms 26 Sep 2024 370th croc54 596 236 15ms 17 Dec 2024 371st Mandrzejy 🇵🇱 596 252 2ms 8 Jul 2024 372nd MeWhenI 🇻🇦 596 285 1,107ms 1 Nov 2023 373rd yuchuehw 593 237 10ms 15 May 2024 373rd Flekay 🇩🇪 593 237 11ms 11 Jul 2025 375th snoozingnewt 🇨🇦 590 157 35ms 18 Oct 2025 376th MeWhenI 🇻🇦 590 299 130ms 20 Jun 2024 377th fgrosshans 🇫🇷 588 239 12ms 7 Nov 2023 378th Shanethegamer 🇺🇸 586 181 239ms 1 Nov 2023 379th CaedenHarper 🇨🇦 586 215 733ms 21 Sep 2025 380th jameswmccarty 586 240 11ms 24 Feb 2025 380th Heathcorp 🇦🇺 586 240 12ms 12 Aug 2025 382nd sean-niemann 🇺🇸 586 324 514ms 24 Sep 2025 383rd snoozingnewt 🇨🇦 585 185 967ms 18 Oct 2025 384th adoxography 584 241 11ms 19 Nov 2023 385th BambooleanLogic 🇸🇪 580 197 10ms 1 Nov 2023 386th snoozingnewt 🇨🇦 578 194 795ms 18 Oct 2025 387th Ripick 575 211 419ms 28 Jun 2025 388th wh3n3v3r 🇨🇿 574 245 12ms 11 Nov 2024 389th bac0id 572 297 557ms 8 Jan 2025 390th tigerdan2 🇩🇪 572 332 491ms 18 days ago 391st neihousaigaai 569 247 15ms 7 Oct 2024 392nd MeWhenI 🇻🇦 566 257 73ms 6 Nov 2023 393rd JunkIce 565 249 12ms 9 Mar 2025 394th MeWhenI 🇻🇦 564 188 289ms 7 Dec 2023 395th galloj 🇨🇿 554 254 11ms 24 Nov 2023 395th MaxElf999 554 254 11ms 9 Feb 2024 397th Yax42 🇫🇷 550 208 11ms 9 Sep 2025 398th bac0id 548 274 2ms 8 Jan 2025 399th Shanethegamer 🇺🇸 544 210 3ms 1 Nov 2023 400th janAkali 🇷🇺 544 268 365ms 7 Jun 2025 First Prev 321–400 of 503 Next Last