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 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 481st dtbao20 🇻🇳 360 247 9ms 1 Oct 2024 481st InigoK 🇺🇸 360 247 9ms 6 Sep 2025 483rd yuchuehw 360 358 677ms 4 Jan 2024 484th Yewzir 🇧🇪 360 691 2,630ms 15 Nov 2025 485th scpchicken 🇵🇼 359 248 16ms 7 Apr 2022 486th JOrE20 🇺🇸 358 271 9ms 16 days ago 487th skps2010 357 249 17ms 28 Dec 2018 487th Indivicivet 357 249 10ms 18 Oct 2021 489th tomh1012 357 382 378ms 6 days ago 490th Phanabani 🇺🇸 353 252 10ms 22 Oct 2020 491st msbranicky 352 535 315ms 31 Aug 2023 492nd cellobix 350 254 16ms 15 Aug 2019 493rd proton 🇩🇪 349 195 37ms 9 Jun 2020 493rd jaredcrystal 🇺🇸 349 195 42ms 14 Dec 2020 495th Ted-Barrett 🇦🇺 349 255 9ms 1 Oct 2021 496th daedals 346 257 17ms 21 Jun 2019 496th rollershutter 346 257 10ms 9 Sep 2022 498th scpchicken 🇵🇼 343 189 373ms 7 Apr 2022 499th schachmattmatt 342 260 10ms 20 Aug 2021 500th Natanaelel 🇸🇪 342 301 6ms 23 Jun 2023 501st hiichbindermax 338 263 9ms 22 Nov 2025 502nd dokutan 338 472 2ms 28 Mar 2025 503rd janbehrens 🇩🇪 337 180 3ms 6 May 2021 504th robin-scragg 337 264 10ms 23 Jul 2025 505th rvdnieuwendijk 🇳🇱 337 268 309ms 29 Jun 2020 506th williamlake 337 527 131ms 17 Sep 2021 507th yokasuretsu 336 265 9ms 26 Apr 2018 507th petar-donchev 336 265 10ms 8 Sep 2019 507th JunkIce 336 265 18ms 24 Nov 2024 510th krcs 🇵🇱 334 266 9ms 30 Jun 2023 511th Dazza314 🇬🇧 333 267 9ms 4 Nov 2020 512th Laksen 🇩🇰 333 562 27ms 8 Jul 2021 513th myfatemi04 332 268 10ms 20 Sep 2018 513th Evan-Robotics 332 268 11ms 28 Jan 2022 515th dokutan 332 434 8ms 4 Feb 2025 516th Bonjour27891 🇻🇳 331 269 12ms 20 Mar 2022 517th msbranicky 330 484 2ms 14 Oct 2023 518th glesnick 327 272 11ms 15 Jul 2022 519th vibdev 326 298 10ms 26 Aug 2021 520th bkshrader 325 274 16ms 27 Dec 2018 521st JunkIce 323 265 525ms 3 Dec 2024 522nd geofft 323 275 10ms 13 Dec 2020 522nd mbittner20 323 275 10ms 21 Jan 2024 524th DrakeSeteraO 322 276 10ms 10 Nov 2025 524th GodlyProgrammer1 322 276 16ms 22 Nov 2025 526th wuminws 322 318 4,081ms 20 Feb 2025 527th KatieLG 🇬🇧 321 424 395ms 24 Oct 2022 528th naveenarun 319 279 10ms 6 Jun 2019 529th NanduBC 318 280 10ms 22 Mar 2021 530th marcin7Cd 318 412 44ms 11 Mar 2021 531st Emutis 🇱🇹 317 281 14ms 14 Nov 2025 532nd postie77 316 431 362ms 2 May 2023 533rd amollberg 🇸🇪 312 285 15ms 15 Jan 2022 534th galloj 🇨🇿 312 330 3ms 17 Jan 2023 535th luuumine 🇫🇷 311 286 10ms 29 Oct 2025 536th mrxz 🇳🇱 311 312 10ms 23 Jun 2024 537th bbakersmith 310 361 14ms 31 Jul 2021 538th yokasuretsu 309 220 36ms 26 Apr 2018 539th dylanarmstrong 309 314 11ms 15 Sep 2024 540th Anonymousellama21 308 334 2ms 16 May 2022 541st karhuthebear 307 290 9ms 5 May 2022 541st SniperSmiley 🇺🇸 307 290 9ms 4 Jul 2022 543rd MeWhenI 🇻🇦 307 416 2ms 25 Aug 2023 544th davecame 306 291 10ms 15 Mar 2024 545th LukeBridges 🇬🇧 306 317 9ms 21 Aug 2024 546th JVerwolf 305 292 14ms 27 Aug 2021 547th Yewzir 🇧🇪 304 293 10ms 19 May 2023 548th juliansiebert 🇩🇪 303 298 346ms 20 Jan 2023 549th LucaArgentiUCF 🇮🇹 302 582 42ms 23 Jan 2021 550th TheZwierzLF 🇵🇱 301 284 672ms 8 days ago 551st neihousaigaai 301 428 658ms 18 Apr 2021 552nd CaedenHarper 🇨🇦 300 324 9ms 6 Nov 2025 553rd neihousaigaai 297 327 9ms 14 May 2021 554th chunky 297 832 2ms 1 Oct 2020 555th BenBanerjeeRichards 296 300 9ms 12 Nov 2021 556th TimCurwick 🇺🇸 296 305 269ms 28 Jul 2020 557th s-g-stavely 296 414 1ms 11 May 2021 558th alexhuntley 295 444 5ms 11 Apr 2021 559th fgrosshans 🇫🇷 293 304 9ms 9 May 2023 560th Yewzir 🇧🇪 292 293 394ms 15 Jan 2024 First Prev 481–560 of 871 Next Last
