The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Morse Encoder 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 561st Schmitt-Very-Cool 439 359 576ms 2 Oct 2025 562nd LorenzoTa 438 247 2ms 26 Apr 2019 563rd logvp 438 313 16ms 31 Jan 2024 564th snoozingnewt 🇨🇦 438 334 97ms 23 Oct 2025 565th jwhear 🇺🇸 438 414 1,843ms 30 Sep 2024 566th dokutan 436 313 9ms 28 Mar 2025 567th mizuzimu 436 314 10ms 12 Apr 2020 567th gXLg 🇩🇪 436 314 10ms 19 Sep 2023 567th andre-lameirinhas 🇵🇹 436 314 10ms 30 Nov 2023 570th yokasuretsu 434 256 48ms 19 Apr 2018 571st try-except-try-accept 🇹🇭 433 316 9ms 28 Jun 2022 572nd decorator-factory 432 317 9ms 21 May 2019 572nd osmith93 432 317 16ms 1 Aug 2021 572nd cykim8811 432 317 15ms 10 Jul 2024 572nd Pyroan 432 317 10ms 22 Feb 2025 576th GrayJoKing 🇦🇺 431 811 2ms 23 Jul 2020 577th lukasmoellerch 429 318 9ms 15 Jul 2019 577th omurakazuaki 🇯🇵 429 318 9ms 13 Feb 2021 579th snoozingnewt 🇨🇦 428 368 533ms 14 Sep 2025 580th msbranicky 428 375 2ms 12 Aug 2023 581st mcreenan 427 270 174ms 16 Jun 2018 582nd Haksell 🇦🇶 427 321 17ms 1 Dec 2019 582nd Florian-Mt 427 321 10ms 13 Nov 2023 584th yzhs 🇩🇪 425 270 32ms 6 Sep 2020 585th johnkiernander 425 321 10ms 10 days ago 586th ejmejm 425 322 9ms 2 Dec 2021 586th inverseLorentz 🇦🇺 425 322 12ms 21 Jun 2022 588th yuchuehw 425 371 669ms 4 Jan 2024 589th garrisonhh 424 323 16ms 19 Nov 2020 590th ericlangedijk 🇸🇮 423 314 367ms 18 Mar 2022 591st smclaughlin-cf 421 324 9ms 15 Apr 2025 592nd yzhs 🇩🇪 419 446 120ms 25 Jul 2021 593rd 1231234md5 🇨🇳 418 326 9ms 29 Jan 2024 594th TobyBoyne 🇬🇧 418 328 9ms 15 Apr 2022 595th mintypython 417 327 9ms 19 Oct 2018 596th Yewzir 🇧🇪 417 416 7ms 24 Dec 2023 597th Florian-Mt 416 328 9ms 13 Nov 2023 598th Emutis 🇱🇹 416 329 10ms 12 Aug 2025 599th dahrens 415 330 9ms 13 May 2021 599th PaulMWeiser 415 330 12ms 3 Mar 2023 601st knutae 🇳🇴 414 331 16ms 20 Jul 2019 601st mrmena 🇦🇺 414 331 18ms 11 Jun 2021 603rd Edjyzod 413 332 10ms 31 Mar 2023 604th madex 🇩🇪 412 311 2ms 11 Jun 2025 605th gnlow 🇰🇷 411 332 9ms 25 Apr 2020 606th qwjhvbxi 411 333 10ms 12 Feb 2024 607th TaserTheFox 🇺🇸 409 335 13ms 5 Apr 2023 608th MaxElf999 405 338 9ms 28 Sep 2022 608th MarshalX 🇵🇱 405 338 10ms 14 Nov 2024 610th eranws 404 338 9ms 24 Oct 2022 611th lomarbrick 404 339 9ms 17 May 2023 611th Mathrew2012 404 339 9ms 9 Nov 2024 613th neihousaigaai 404 390 636ms 18 May 2021 614th za3k 403 340 9ms 8 Oct 2022 614th RaBa21 🇭🇺 403 340 16ms 13 Jul 2025 616th Psirving 402 341 11ms 2 Aug 2020 616th TheZwierzLF 🇵🇱 402 341 11ms 14 days ago 618th pg98 400 341 9ms 5 Sep 2019 619th TheAristos 399 343 11ms 30 Oct 2019 620th ericlangedijk 🇸🇮 399 490 61ms 23 Feb 2022 621st adriweb 🇫🇷 398 382 2ms 11 Aug 2023 622nd perlebach 🇨🇿 397 273 3ms 17 Aug 2021 623rd n1LS 397 280 43ms 26 Sep 2019 624th fitzdotlol 🇺🇸 397 344 9ms 28 Mar 2022 625th CheeseCake628 🇳🇴 397 345 12ms 20 Jun 2025 625th vgamula 🇺🇦 397 345 9ms 7 Jul 2025 627th shreyasminocha 395 345 10ms 2 Aug 2020 628th nephila-nacrea 🇬🇧 394 275 2ms 24 Jun 2020 629th DaCoolOne 393 387 2ms 27 Feb 2020 630th OllieBoyne 🇬🇧 392 349 11ms 23 Jan 2021 630th SB-945 392 349 18ms 4 Sep 2023 630th Jacob385 392 349 9ms 1 May 2024 633rd Natanaelel 🇸🇪 390 312 3ms 23 Jun 2023 634th MeWhenI 🇻🇦 390 731 677ms 9 Feb 2025 635th SoliGhost 389 352 12ms 8 Jun 2025 636th masflam 388 309 667ms 6 May 2021 637th jgbaldwinbrown 387 437 315ms 9 Jul 2021 638th kjhughes097 🇬🇧 386 344 370ms 9 Dec 2020 639th aksyristos 386 355 9ms 14 Mar 2023 639th codewrite 🇬🇧 386 355 10ms 12 Jul 2025 First Prev 561–640 of 985 Next Last
