The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Morse Decoder 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 481st SniperSmiley 🇺🇸 434 298 9ms 4 Jul 2022 482nd dokutan 434 347 2ms 17 Apr 2024 483rd yokasuretsu 433 235 155ms 28 Jun 2018 484th MeWhenI 🇻🇦 431 354 1,336ms 30 Oct 2023 485th msrawson 428 302 10ms 2 Sep 2018 485th Bonjour27891 🇻🇳 428 302 11ms 13 Mar 2022 487th kaascevich 428 373 347ms 14 Sep 2025 488th JRaspass 🇬🇧 427 264 3ms 5 Sep 2021 489th BenBanerjeeRichards 426 304 9ms 12 Nov 2021 490th hyvyys 424 287 10ms 18 Sep 2020 491st LorenzoTa 423 267 3ms 27 Apr 2019 492nd fgrosshans 🇫🇷 423 306 9ms 9 May 2023 493rd TheZwierzLF 🇵🇱 420 292 672ms 8 days ago 494th snoozingnewt 🇨🇦 420 334 499ms 4 Nov 2025 495th AlexDaniel 🇪🇪 419 243 158ms 13 Mar 2018 496th hamhub7 418 356 372ms 18 Aug 2022 497th eiburns 416 311 10ms 25 Aug 2023 498th rvdnieuwendijk 🇳🇱 414 276 309ms 29 Jun 2020 499th robymus 413 246 46ms 18 Sep 2018 500th ericlangedijk 🇸🇮 411 362 356ms 19 Mar 2022 501st nephila-nacrea 🇬🇧 410 275 3ms 21 Mar 2018 502nd proton 🇩🇪 408 249 37ms 9 Jun 2020 503rd patbassing 406 319 10ms 8 Jul 2019 503rd dymowski 406 319 9ms 3 Jan 2020 505th lukechampine 404 476 332ms 19 Apr 2020 506th CarsonChr 🇺🇸 402 370 366ms 21 Jan 2025 507th graft 401 253 43ms 10 Mar 2018 508th jerrandolph 401 480 287ms 21 Apr 2020 509th Yewzir 🇧🇪 400 413 2ms 18 Oct 2023 510th mathisfun271 399 324 10ms 19 Feb 2024 511th vibdev 397 306 10ms 26 Aug 2021 512th NicoAdams 397 326 9ms 30 Dec 2021 513th labster 396 285 3ms 25 Feb 2018 514th edre 393 329 11ms 30 Apr 2018 515th relet 392 330 15ms 9 Aug 2018 515th TobyBoyne 🇬🇧 392 330 9ms 15 Apr 2022 515th neihousaigaai 392 330 10ms 14 Feb 2024 518th mizuzimu 391 331 9ms 16 Mar 2021 519th LeeCamp 390 332 16ms 25 Dec 2021 520th tomh1012 389 382 378ms 6 days ago 521st albanian-laundromat 386 335 10ms 3 Apr 2025 522nd kurkale6ka 385 336 17ms 28 Dec 2023 523rd juliansiebert 🇩🇪 384 298 346ms 20 Jan 2023 524th zdzc 384 337 10ms 1 Apr 2018 525th yuchuehw 384 366 677ms 4 Jan 2024 526th masinag 🇮🇹 383 345 2ms 5 Nov 2024 527th TheDrawingCoder-Gamer 383 393 2ms 6 Jul 2025 528th dylanarmstrong 382 318 11ms 15 Sep 2024 529th bac0id 381 390 434ms 4 Jul 2024 530th tpaxman 🇨🇦 380 340 9ms 17 Dec 2020 530th OllieBoyne 🇬🇧 380 340 10ms 14 Apr 2022 532nd MeWhenI 🇻🇦 380 740 665ms 9 Feb 2025 533rd mcreenan 378 269 183ms 16 Jun 2018 534th dokutan 378 744 724ms 12 Jan 2025 535th KatieLG 🇬🇧 375 345 10ms 19 Jul 2025 536th LukeBridges 🇬🇧 374 325 9ms 21 Aug 2024 537th 77Tigers 374 346 10ms 2 Mar 2021 538th neihousaigaai 372 327 9ms 14 May 2021 539th GodlyProgrammer1 370 350 10ms 22 Nov 2025 540th fuchen 370 427 1,440ms 11 May 2020 541st SirFireball3521 369 276 222ms 1 Mar 2023 542nd jfallon1997 369 351 10ms 24 Aug 2022 543rd guliyevemil1 🇦🇿 368 523 339ms 16 Apr 2020 544th TimCurwick 🇺🇸 365 313 269ms 28 Jul 2020 545th Natanaelel 🇸🇪 364 301 6ms 23 Jun 2023 546th Yewzir 🇧🇪 364 699 2,630ms 15 Nov 2025 547th TaserTheFox 🇺🇸 363 356 10ms 4 Apr 2023 547th vgamula 🇺🇦 363 356 12ms 8 Jul 2025 549th CaedenHarper 🇨🇦 362 336 9ms 6 Nov 2025 550th dzshn 362 357 11ms 25 Nov 2020 550th Pena86 362 357 10ms 31 Dec 2021 552nd s-g-stavely 362 416 1ms 11 May 2021 553rd aksyristos 360 359 10ms 12 Mar 2023 553rd inverseLorentz 🇦🇺 360 359 10ms 11 Mar 2024 555th MaxCastella 🇫🇷 359 318 296ms 15 Mar 2024 556th Psirving 359 360 11ms 2 Aug 2020 556th fajost 359 360 14ms 8 Sep 2020 558th leon-w 357 362 10ms 12 Jul 2019 558th TheAristos 357 362 10ms 30 Oct 2019 560th dokutan 356 285 33ms 21 Apr 2025 First Prev 481–560 of 874 Next Last
