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 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 MeWhenI 🇻🇦 458 189 142ms 3 Aug 2024 402nd MeWhenI 🇻🇦 458 308 10ms 27 Jun 2024 403rd snoozingnewt 🇨🇦 456 457 35ms 18 Oct 2025 404th snoozingnewt 🇨🇦 455 157 35ms 18 Oct 2025 405th hiichbindermax 452 211 10ms 20 Nov 2023 405th thienudomsrirungruang 452 211 11ms 1 Apr 2024 407th YAJUE114514 448 213 11ms 8 days ago 408th VictorFordham 444 215 12ms 24 Nov 2023 409th alemelis 441 200 1,474ms 20 Sep 2024 410th CaedenHarper 🇨🇦 438 218 18ms 21 Sep 2025 411th amollberg 🇸🇪 434 220 11ms 14 Jan 2024 412th MeWhenI 🇻🇦 434 221 768ms 30 Aug 2025 413th IISResetMe 431 210 695ms 15 days ago 414th blaztoma 🇱🇹 430 453 124ms 19 days ago 415th snoozingnewt 🇨🇦 427 323 113ms 18 Oct 2025 416th jgbaldwinbrown 427 349 2ms 14 Mar 2024 417th snoozingnewt 🇨🇦 427 395 2,965ms 18 Oct 2025 418th snoozingnewt 🇨🇦 422 267 3ms 18 Oct 2025 419th Ripick 418 211 419ms 28 Jun 2025 420th CaedenHarper 🇨🇦 417 215 733ms 21 Sep 2025 421st CaedenHarper 🇨🇦 416 236 11ms 15 Sep 2025 421st JOrE20 🇺🇸 416 236 15ms 11 days ago 423rd jtaxen 415 230 11ms 8 Jun 2024 424th alemelis 408 234 31ms 11 Oct 2024 425th Schmitt-Very-Cool 408 462 464ms 26 Sep 2025 426th snoozingnewt 🇨🇦 406 207 3ms 18 Oct 2025 427th croc54 404 236 15ms 17 Dec 2024 428th Flekay 🇩🇪 403 237 11ms 11 Jul 2025 429th dokutan 401 220 1,241ms 7 Mar 2024 430th fgrosshans 🇫🇷 399 239 12ms 7 Nov 2023 431st jameswmccarty 398 240 11ms 24 Feb 2025 431st Heathcorp 🇦🇺 398 240 12ms 12 Aug 2025 433rd snoozingnewt 🇨🇦 397 247 10ms 18 Oct 2025 434th adoxography 396 241 11ms 19 Nov 2023 435th snoozingnewt 🇨🇦 395 492 44ms 18 Oct 2025 436th neihousaigaai 386 247 15ms 7 Oct 2024 437th retrohun 385 339 84ms 18 Nov 2023 438th CaedenHarper 🇨🇦 385 489 584ms 7 Oct 2025 439th galloj 🇨🇿 376 254 11ms 24 Nov 2023 439th MaxElf999 376 254 11ms 9 Feb 2024 441st snoozingnewt 🇨🇦 372 418 148ms 18 Oct 2025 442nd snoozingnewt 🇨🇦 369 354 53ms 18 Oct 2025 443rd msbranicky 369 413 20ms 1 Nov 2023 444th MeWhenI 🇻🇦 368 355 146ms 18 Nov 2023 445th logvp 366 261 15ms 6 Oct 2024 446th msbranicky 365 563 267ms 1 Nov 2023 447th za3k 364 262 11ms 22 Jul 2025 448th zakariamouhid 356 276 9ms 1 Nov 2023 449th msbranicky 356 462 11ms 1 Nov 2023 450th BREMAUCY 🇫🇷 353 270 13ms 21 Aug 2025 451st JDiLenarda 🇫🇷 353 490 1,367ms 13 Sep 2024 452nd FortuiteMan 🇫🇷 351 272 10ms 14 Oct 2024 453rd jkelly467 351 383 4,179ms 22 Oct 2025 454th KatieLG 🇬🇧 348 740 17ms 25 Aug 2024 455th alexjurkiewicz 🇦🇺 347 275 11ms 14 Nov 2023 456th arcpolaris 345 413 398ms 27 Mar 2025 457th FranklinJiaChen 343 278 13ms 4 Jul 2024 458th Xzyaihni 343 607 224ms 1 Nov 2023 459th BREMAUCY 🇫🇷 336 267 1,103ms 21 Aug 2025 460th RockOfStone 334 355 3ms 5 Mar 2024 461st madex 🇩🇪 333 625 312ms 8 Oct 2025 462nd jelleromer 329 290 24ms 19 Nov 2023 463rd snoozingnewt 🇨🇦 329 574 125ms 18 Oct 2025 464th msbranicky 328 633 246ms 1 Nov 2023 465th snoozingnewt 🇨🇦 326 364 2ms 18 Oct 2025 466th CaedenHarper 🇨🇦 326 436 399ms 17 Oct 2025 467th snoozingnewt 🇨🇦 321 538 1,312ms 18 Oct 2025 468th msbranicky 320 298 13ms 1 Nov 2023 469th mbittner20 319 299 11ms 12 Feb 2024 470th iczelia 🇩🇪 319 308 10ms 17 Oct 2025 471st snoozingnewt 🇨🇦 319 442 5ms 18 Oct 2025 472nd haighd 312 306 11ms 21 Nov 2023 473rd madex 🇩🇪 308 310 12ms 8 Oct 2025 474th snoozingnewt 🇨🇦 303 298 394ms 18 Oct 2025 475th acollett89 303 324 11ms 8 Aug 2025 476th snoozingnewt 🇨🇦 303 491 2ms 18 Oct 2025 477th msbranicky 301 298 768ms 17 Jan 2024 478th ravnskjaer 🇩🇰 295 639 407ms 3 days ago 479th sojumasterGA 294 308 331ms 2 Nov 2023 480th RZ781 283 337 13ms 19 Nov 2023 First Prev 401–480 of 500 Next Last