The Calendar hole will go live in approximately 10 hours. 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 MeWhenI 🇻🇦 684 167 10ms 1 Nov 2023 322nd snoozingnewt 🇨🇦 684 303 319ms 18 Oct 2025 323rd Pyroan 683 206 11ms 12 Mar 2025 324th emgordon154 682 404 1,617ms 3 days ago 325th Shanethegamer 🇺🇸 680 217 6ms 12 Nov 2023 326th Natanaelel 🇸🇪 678 242 162ms 19 May 2024 327th kkoenig 677 306 267ms 7 Sep 2025 328th nwellnhof 🇩🇪 672 160 206ms 1 Nov 2023 329th stefangimmillaro 672 214 386ms 5 Nov 2023 330th snoozingnewt 🇨🇦 668 239 98ms 18 Oct 2025 331st hiichbindermax 667 211 10ms 20 Nov 2023 331st thienudomsrirungruang 667 211 11ms 1 Apr 2024 333rd two-bad 🇬🇧 665 172 10ms 25 Feb 2024 334th alexsave 661 173 10ms 13 Nov 2025 335th scpchicken 🇵🇼 660 130 49ms 1 Nov 2023 336th YAJUE114514 660 213 11ms 20 days ago 337th MeWhenI 🇻🇦 659 234 5ms 4 Dec 2023 338th Natanaelel 🇸🇪 657 129 36ms 1 Nov 2023 339th snoozingnewt 🇨🇦 656 319 228ms 23 Nov 2025 340th VictorFordham 654 215 12ms 24 Nov 2023 341st MeWhenI 🇻🇦 652 184 58ms 15 Jul 2025 342nd elgan65536 650 322 212ms 11 Apr 2024 343rd keelimeguy 🇺🇸 648 217 59ms 16 Nov 2023 344th CaedenHarper 🇨🇦 645 218 18ms 21 Sep 2025 345th tatzyr 🇯🇵 644 144 39ms 21 Feb 2025 346th edsrzf 🇳🇿 644 325 308ms 23 Jun 2025 347th LukeBridges 🇬🇧 642 178 11ms 14 Aug 2024 348th KatieLG 🇬🇧 640 197 698ms 19 Apr 2025 349th janbehrens 🇩🇪 639 190 453ms 9 Jan 2024 350th amollberg 🇸🇪 639 220 11ms 14 Jan 2024 351st stefangimmillaro 629 216 3,257ms 12 Nov 2024 352nd weliveinhell 🇭🇹 628 182 10ms 1 Nov 2023 353rd MeWhenI 🇻🇦 628 393 61ms 24 Jun 2024 354th MeWhenI 🇻🇦 627 189 142ms 3 Aug 2024 355th lukegustafson 🇺🇸 621 184 9ms 8 Mar 2024 356th MeWhenI 🇻🇦 621 242 2ms 3 Sep 2024 357th GolfingSuccess 🇬🇷 618 200 24ms 20 Aug 2024 358th snoozingnewt 🇨🇦 618 220 3,411ms 18 Oct 2025 359th snoozingnewt 🇨🇦 618 243 6ms 18 Oct 2025 360th janbehrens 🇩🇪 618 307 439ms 22 Dec 2023 361st annaproxy 617 266 161ms 6 Nov 2023 362nd Shanethegamer 🇺🇸 615 227 7ms 1 Nov 2023 363rd jtaxen 612 230 11ms 8 Jun 2024 363rd luuumine 🇫🇷 612 230 13ms 29 Oct 2025 365th Shanethegamer 🇺🇸 611 304 55ms 30 Aug 2024 366th jared-hughes 608 247 2ms 18 Aug 2024 367th alemelis 607 200 1,374ms 20 Sep 2024 368th alemelis 601 234 31ms 11 Oct 2024 369th Mandrzejy 🇵🇱 600 283 67ms 8 Jul 2024 370th MeWhenI 🇻🇦 598 180 141ms 26 Sep 2024 371st croc54 596 236 15ms 17 Dec 2024 372nd Mandrzejy 🇵🇱 596 252 2ms 8 Jul 2024 373rd MeWhenI 🇻🇦 596 285 1,107ms 1 Nov 2023 374th yuchuehw 594 237 10ms 15 May 2024 374th Flekay 🇩🇪 594 237 11ms 11 Jul 2025 376th snoozingnewt 🇨🇦 591 157 37ms 18 Oct 2025 377th MeWhenI 🇻🇦 590 299 130ms 20 Jun 2024 378th fgrosshans 🇫🇷 589 239 12ms 7 Nov 2023 379th Shanethegamer 🇺🇸 586 181 239ms 1 Nov 2023 380th CaedenHarper 🇨🇦 586 215 733ms 21 Sep 2025 381st jameswmccarty 586 240 11ms 24 Feb 2025 381st Heathcorp 🇦🇺 586 240 12ms 12 Aug 2025 383rd sean-niemann 🇺🇸 586 324 514ms 24 Sep 2025 384th snoozingnewt 🇨🇦 585 185 967ms 18 Oct 2025 385th adoxography 584 241 11ms 19 Nov 2023 386th BambooleanLogic 🇸🇪 580 197 10ms 1 Nov 2023 387th snoozingnewt 🇨🇦 578 194 795ms 18 Oct 2025 388th Ripick 575 211 345ms 28 Jun 2025 389th wh3n3v3r 🇨🇿 574 245 12ms 11 Nov 2024 390th bac0id 572 297 423ms 8 Jan 2025 391st tigerdan2 🇩🇪 572 332 491ms 30 Nov 2025 392nd neihousaigaai 569 247 15ms 7 Oct 2024 393rd MeWhenI 🇻🇦 566 257 73ms 6 Nov 2023 394th JunkIce 565 249 12ms 9 Mar 2025 395th MeWhenI 🇻🇦 564 188 289ms 7 Dec 2023 396th galloj 🇨🇿 554 254 11ms 24 Nov 2023 396th MaxElf999 554 254 11ms 9 Feb 2024 398th Yax42 🇫🇷 550 208 11ms 9 Sep 2025 399th bac0id 548 274 2ms 8 Jan 2025 400th Shanethegamer 🇺🇸 544 210 3ms 1 Nov 2023 First Prev 321–400 of 505 Next Last