The Calendar hole will go live in approximately 5 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 zdzc 440 311 16ms 30 Mar 2018 562nd Giantnoodlemonster 439 292 2ms 29 Sep 2024 563rd Schmitt-Very-Cool 439 359 576ms 2 Oct 2025 564th LorenzoTa 438 247 2ms 26 Apr 2019 565th logvp 438 313 16ms 31 Jan 2024 566th snoozingnewt 🇨🇦 438 334 97ms 23 Oct 2025 567th jwhear 🇺🇸 438 414 1,843ms 30 Sep 2024 568th dokutan 436 313 9ms 28 Mar 2025 569th mizuzimu 436 314 10ms 12 Apr 2020 569th gXLg 🇩🇪 436 314 10ms 19 Sep 2023 569th andre-lameirinhas 🇵🇹 436 314 10ms 30 Nov 2023 572nd yokasuretsu 434 256 48ms 19 Apr 2018 573rd try-except-try-accept 🇹🇭 433 316 9ms 28 Jun 2022 574th decorator-factory 432 317 9ms 21 May 2019 574th osmith93 432 317 16ms 1 Aug 2021 574th cykim8811 432 317 15ms 10 Jul 2024 574th Pyroan 432 317 10ms 22 Feb 2025 578th GrayJoKing 🇦🇺 431 811 2ms 23 Jul 2020 579th lukasmoellerch 429 318 9ms 15 Jul 2019 579th omurakazuaki 🇯🇵 429 318 9ms 13 Feb 2021 581st snoozingnewt 🇨🇦 428 368 533ms 14 Sep 2025 582nd msbranicky 428 375 2ms 12 Aug 2023 583rd mcreenan 427 270 112ms 16 Jun 2018 584th Haksell 🇦🇶 427 321 17ms 1 Dec 2019 584th Florian-Mt 427 321 10ms 13 Nov 2023 586th yzhs 🇩🇪 425 270 32ms 6 Sep 2020 587th johnkiernander 425 321 10ms 14 days ago 588th ejmejm 425 322 9ms 2 Dec 2021 588th inverseLorentz 🇦🇺 425 322 12ms 21 Jun 2022 590th yuchuehw 425 371 669ms 4 Jan 2024 591st garrisonhh 424 323 16ms 19 Nov 2020 592nd ericlangedijk 🇸🇮 423 314 367ms 18 Mar 2022 593rd smclaughlin-cf 421 324 9ms 15 Apr 2025 594th yzhs 🇩🇪 419 446 120ms 25 Jul 2021 595th 1231234md5 🇨🇳 418 326 9ms 29 Jan 2024 596th TobyBoyne 🇬🇧 418 328 9ms 15 Apr 2022 597th mintypython 417 327 9ms 19 Oct 2018 598th Yewzir 🇧🇪 417 416 7ms 24 Dec 2023 599th Florian-Mt 416 328 9ms 13 Nov 2023 600th Emutis 🇱🇹 416 329 10ms 12 Aug 2025 601st dahrens 415 330 9ms 13 May 2021 601st PaulMWeiser 415 330 12ms 3 Mar 2023 603rd knutae 🇳🇴 414 331 16ms 20 Jul 2019 603rd mrmena 🇦🇺 414 331 18ms 11 Jun 2021 605th Edjyzod 413 332 10ms 31 Mar 2023 606th madex 🇩🇪 412 311 2ms 11 Jun 2025 607th gnlow 🇰🇷 411 332 9ms 25 Apr 2020 608th qwjhvbxi 411 333 10ms 12 Feb 2024 609th TaserTheFox 🇺🇸 409 335 13ms 5 Apr 2023 610th MaxElf999 405 338 9ms 28 Sep 2022 610th MarshalX 🇵🇱 405 338 10ms 14 Nov 2024 612th eranws 404 338 9ms 24 Oct 2022 613th lomarbrick 404 339 9ms 17 May 2023 613th Mathrew2012 404 339 9ms 9 Nov 2024 615th neihousaigaai 404 390 636ms 18 May 2021 616th za3k 403 340 9ms 8 Oct 2022 616th RaBa21 🇭🇺 403 340 16ms 13 Jul 2025 618th Psirving 402 341 11ms 2 Aug 2020 618th TheZwierzLF 🇵🇱 402 341 11ms 18 days ago 620th pg98 400 341 9ms 5 Sep 2019 621st TheAristos 399 343 11ms 30 Oct 2019 622nd ericlangedijk 🇸🇮 399 490 61ms 23 Feb 2022 623rd adriweb 🇫🇷 398 382 2ms 11 Aug 2023 624th perlebach 🇨🇿 397 273 3ms 17 Aug 2021 625th n1LS 397 280 45ms 26 Sep 2019 626th fitzdotlol 🇺🇸 397 344 9ms 28 Mar 2022 627th CheeseCake628 🇳🇴 397 345 12ms 20 Jun 2025 627th vgamula 🇺🇦 397 345 9ms 7 Jul 2025 629th shreyasminocha 395 345 10ms 2 Aug 2020 630th nephila-nacrea 🇬🇧 394 275 2ms 24 Jun 2020 631st DaCoolOne 393 387 2ms 27 Feb 2020 632nd OllieBoyne 🇬🇧 392 349 11ms 23 Jan 2021 632nd SB-945 392 349 18ms 4 Sep 2023 632nd Jacob385 392 349 9ms 1 May 2024 635th Natanaelel 🇸🇪 390 312 3ms 23 Jun 2023 636th MeWhenI 🇻🇦 390 731 677ms 9 Feb 2025 637th SoliGhost 389 352 12ms 8 Jun 2025 638th masflam 388 309 561ms 6 May 2021 639th jgbaldwinbrown 387 437 315ms 9 Jul 2021 640th kjhughes097 🇬🇧 386 344 370ms 9 Dec 2020 First Prev 561–640 of 987 Next Last
