The Calendar hole will go live in approximately 43 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 401st FlorianCassayre 🇫🇷 541 260 11ms 3 Nov 2023 402nd CaedenHarper 🇨🇦 539 208 766ms 20 Sep 2025 403rd logvp 539 261 15ms 6 Oct 2024 404th tomh1012 538 267 404ms 9 Nov 2023 405th za3k 537 262 11ms 22 Jul 2025 406th CaedenHarper 🇨🇦 530 391 310ms 2 Nov 2025 407th KatieLG 🇬🇧 523 207 1,011ms 15 Oct 2024 408th JunkIce 523 241 763ms 9 Mar 2025 409th BREMAUCY 🇫🇷 521 270 13ms 21 Aug 2025 410th MeWhenI 🇻🇦 517 221 16ms 20 Jun 2024 410th HumanoidCPU 517 221 10ms 6 days ago 412th FortuiteMan 🇫🇷 517 272 10ms 14 Oct 2024 413th Aurel300 🇨🇭 517 405 261ms 21 Jun 2024 414th snoozingnewt 🇨🇦 515 240 19ms 18 Oct 2025 415th albanian-laundromat 513 223 7ms 2 Jul 2025 416th alexjurkiewicz 🇦🇺 512 275 11ms 14 Nov 2023 417th MeWhenI 🇻🇦 508 221 768ms 30 Aug 2025 418th snoozingnewt 🇨🇦 508 374 454ms 18 Oct 2025 419th FranklinJiaChen 506 278 13ms 4 Jul 2024 420th IISResetMe 505 210 695ms 27 days ago 421st AlephSquirrel 501 360 6ms 14 May 2025 422nd dokutan 497 283 12ms 5 Jul 2024 423rd MateuszPietrzak 🇵🇱 494 344 73ms 19 Nov 2023 424th jelleromer 485 290 24ms 19 Nov 2023 425th CaedenHarper 🇨🇦 484 236 11ms 15 Sep 2025 426th KatieLG 🇬🇧 483 192 38ms 15 Oct 2024 427th madeforlosers 480 238 10ms 5 Nov 2025 428th Shanethegamer 🇺🇸 476 180 5ms 9 Nov 2023 429th snoozingnewt 🇨🇦 475 307 573ms 18 Oct 2025 430th nemoyatpeace 474 297 19ms 8 hours ago 431st jerrandolph 473 438 255ms 1 Nov 2023 432nd BREMAUCY 🇫🇷 472 267 1,103ms 21 Aug 2025 433rd msbranicky 472 298 13ms 1 Nov 2023 434th mbittner20 470 299 11ms 12 Feb 2024 435th MeWhenI 🇻🇦 464 308 10ms 27 Jun 2024 436th roguh 🇬🇹 464 324 2ms 15 Oct 2024 437th snoozingnewt 🇨🇦 463 247 10ms 18 Oct 2025 438th Yewzir 🇧🇪 461 305 12ms 20 days ago 439th haighd 460 306 11ms 21 Nov 2023 440th snoozingnewt 🇨🇦 460 457 35ms 18 Oct 2025 441st dokutan 458 275 847ms 5 Jul 2024 442nd madex 🇩🇪 454 310 12ms 8 Oct 2025 443rd blaztoma 🇱🇹 434 453 124ms 28 Nov 2025 444th dokutan 432 281 740ms 18 Mar 2025 445th snoozingnewt 🇨🇦 432 323 113ms 18 Oct 2025 446th jgbaldwinbrown 430 349 2ms 14 Mar 2024 447th snoozingnewt 🇨🇦 430 395 2,657ms 18 Oct 2025 448th snoozingnewt 🇨🇦 428 267 3ms 18 Oct 2025 449th msbranicky 423 298 768ms 17 Jan 2024 450th RZ781 417 337 13ms 19 Nov 2023 451st snoozingnewt 🇨🇦 414 207 3ms 18 Oct 2025 452nd zakariamouhid 414 276 9ms 1 Nov 2023 453rd Babafaba 414 340 12ms 17 Nov 2025 454th Schmitt-Very-Cool 411 462 464ms 26 Sep 2025 455th TheZwierzLF 🇵🇱 403 230 54ms 33 hours ago 456th snoozingnewt 🇨🇦 398 492 44ms 18 Oct 2025 457th retrohun 391 339 58ms 18 Nov 2023 458th CaedenHarper 🇨🇦 388 489 584ms 7 Oct 2025 459th snoozingnewt 🇨🇦 384 364 3ms 18 Oct 2025 460th Babafaba 378 333 813ms 17 Nov 2025 461st jensdewaard 378 372 14ms 19 Nov 2023 462nd snoozingnewt 🇨🇦 376 418 148ms 18 Oct 2025 463rd snoozingnewt 🇨🇦 374 354 47ms 18 Oct 2025 464th msbranicky 374 413 20ms 1 Nov 2023 465th msbranicky 374 462 11ms 1 Nov 2023 466th MeWhenI 🇻🇦 373 355 146ms 18 Nov 2023 467th iczelia 🇩🇪 371 308 10ms 17 Oct 2025 468th msbranicky 368 563 267ms 1 Nov 2023 469th JDiLenarda 🇫🇷 357 490 1,367ms 13 Sep 2024 470th snoozingnewt 🇨🇦 356 298 394ms 18 Oct 2025 471st jkelly467 355 383 3,257ms 22 Oct 2025 472nd acollett89 353 324 11ms 8 Aug 2025 473rd KatieLG 🇬🇧 351 740 17ms 25 Aug 2024 474th DialFrost 🇸🇬 350 402 14ms 1 Nov 2023 475th arcpolaris 348 413 398ms 27 Mar 2025 476th Lv0Sys 🇵🇱 345 408 13ms 20 days ago 477th Xzyaihni 345 607 224ms 1 Nov 2023 478th sojumasterGA 344 308 319ms 2 Nov 2023 479th madex 🇩🇪 335 625 312ms 8 Oct 2025 480th snoozingnewt 🇨🇦 332 574 125ms 18 Oct 2025 First Prev 401–480 of 504 Next Last