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 401st filharmonista 526 251 2ms 9 Mar 2020 402nd yuchuehw 524 247 9ms 4 Jan 2024 402nd Flekay 🇩🇪 524 247 9ms 11 Jul 2025 404th IISResetMe 522 219 296ms 19 days ago 405th annaproxy 520 249 9ms 15 Jan 2023 405th adamnielson42 🇺🇸 520 249 10ms 16 Nov 2023 407th scpchicken 🇵🇼 517 197 373ms 7 Apr 2022 408th lacroixjonathan87 516 210 4ms 3 Jan 2021 409th Indivicivet 515 251 10ms 18 Oct 2021 410th snoozingnewt 🇨🇦 515 296 91ms 22 Nov 2025 411th dokutan 514 334 3ms 19 days ago 412th jaredcrystal 🇺🇸 510 199 42ms 14 Dec 2020 413th Mabeloid 🇳🇴 509 254 10ms 12 Sep 2024 413th CopperyMarrow15 509 254 14ms 24 Aug 2025 415th jwhear 🇺🇸 509 500 1,752ms 30 Sep 2024 416th gastropner 508 260 2ms 24 Dec 2020 417th Ted-Barrett 🇦🇺 507 255 9ms 1 Oct 2021 417th InigoK 🇺🇸 507 255 9ms 6 Sep 2025 419th tobeannouncd 506 361 123ms 8 Jan 2024 420th cellobix 505 256 16ms 15 Aug 2019 420th scpchicken 🇵🇼 505 256 16ms 7 Apr 2022 422nd marcin7Cd 504 519 6ms 16 Nov 2020 423rd janbehrens 🇩🇪 502 216 5ms 2 Jul 2023 424th janbehrens 🇩🇪 500 261 606ms 24 Mar 2022 425th JDiLenarda 🇫🇷 498 317 1,451ms 29 Nov 2023 426th janbehrens 🇩🇪 496 186 716ms 11 Jul 2023 427th MeWhenI 🇻🇦 496 240 101ms 27 Jan 2023 428th daedals 496 261 17ms 21 Jun 2019 429th bwat2 496 283 687ms 8 Mar 2022 430th emgordon154 492 305 4ms 26 Jan 2025 431st Lv0Sys 🇵🇱 488 189 651ms 21 days ago 432nd didion0 🇺🇸 488 249 9ms 1 Dec 2021 432nd weliveinhell 🇭🇹 488 249 9ms 1 Feb 2024 434th hiichbindermax 488 265 9ms 22 Nov 2025 435th Phanabani 🇺🇸 486 266 10ms 22 Oct 2020 435th krcs 🇵🇱 486 266 9ms 30 Jun 2023 437th iznax 486 306 359ms 21 Nov 2021 438th choroba 484 233 3ms 3 May 2018 439th Mabeloid 🇳🇴 483 254 666ms 17 Sep 2024 440th Evan-Robotics 483 268 11ms 28 Jan 2022 441st viv511 479 318 1,392ms 16 Feb 2025 442nd vezzick 476 272 9ms 6 Mar 2021 442nd knutae 🇳🇴 476 272 10ms 21 Aug 2021 442nd glesnick 476 272 11ms 15 Jul 2022 445th NerdyMcNerd42 474 273 10ms 18 Feb 2023 446th janbehrens 🇩🇪 473 297 695ms 7 Jan 2021 447th Ripick 473 363 340ms 11 Aug 2024 448th bkshrader 472 274 16ms 27 Dec 2018 449th KatieLG 🇬🇧 470 216 656ms 10 Apr 2022 450th geofft 470 275 10ms 13 Dec 2020 451st ArmaanAS 469 259 10ms 25 Mar 2021 452nd myfatemi04 469 276 10ms 20 Sep 2018 453rd kevinmchung 467 277 12ms 24 Feb 2018 453rd yokasuretsu 467 277 9ms 26 Apr 2018 453rd mbittner20 467 277 10ms 21 Jan 2024 456th yzhs 🇩🇪 466 392 143ms 2 Aug 2021 457th naveenarun 464 279 10ms 6 Jun 2019 457th Starwort 🇬🇧 464 279 10ms 10 Feb 2020 459th NanduBC 462 280 10ms 22 Mar 2021 459th DrakeSeteraO 462 280 10ms 10 Nov 2025 461st elgan65536 462 396 194ms 6 Mar 2024 462nd bstrautin 455 251 257ms 5 Jun 2020 463rd wh3n3v3r 🇨🇿 454 268 9ms 11 Nov 2024 464th skps2010 454 285 17ms 28 Dec 2018 464th amollberg 🇸🇪 454 285 15ms 15 Jan 2022 466th Schmitt-Very-Cool 453 310 587ms 3 Oct 2025 467th dtbao20 🇻🇳 451 287 9ms 1 Oct 2024 467th Emutis 🇱🇹 451 287 14ms 14 Nov 2025 469th arctouch-cristiannevianna 448 332 354ms 1 Mar 2024 470th MarcMush 🇫🇷 447 206 1,393ms 4 Feb 2024 471st olleicua 🇺🇸 446 228 34ms 28 May 2024 472nd davecame 445 291 10ms 15 Mar 2024 473rd Waffle3z 445 339 1ms 22 Oct 2020 474th karhuthebear 443 292 9ms 5 May 2022 475th tatzyr 🇯🇵 440 231 56ms 24 Feb 2025 476th janAkali 🇷🇺 439 391 380ms 2 Jun 2025 477th yokasuretsu 438 232 36ms 26 Apr 2018 478th petar-donchev 437 296 10ms 8 Sep 2019 478th JVerwolf 437 296 14ms 26 Aug 2021 480th c0d3-4-F00d 🇩🇪 437 302 2ms 11 Feb 2022 First Prev 401–480 of 874 Next Last