The Calendar hole will go live in approximately 13 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 641st arcpolaris 384 346 452ms 11 Nov 2025 642nd juliansiebert 🇩🇪 383 298 325ms 15 Jun 2025 643rd tomh1012 383 347 400ms 21 Sep 2022 644th jfallon1997 383 358 10ms 13 May 2024 645th LucaArgentiUCF 🇮🇹 383 484 46ms 25 Jan 2021 646th jahakari 382 348 353ms 21 Nov 2021 647th betaveros 382 359 9ms 1 Jan 2023 648th LSWdigital 381 403 13ms 15 Dec 2021 649th jerrandolph 381 444 322ms 3 Nov 2023 650th Yewzir 🇧🇪 381 475 1,899ms 7 May 2024 651st dzshn 380 360 10ms 25 Nov 2020 651st stordev 380 360 9ms 26 Feb 2021 651st richard-oelze 🇩🇪 380 360 10ms 20 Mar 2021 651st 77Tigers 380 360 10ms 28 May 2021 655th Blendi-Goose 380 401 2ms 5 Oct 2025 656th tobeannouncd 379 493 128ms 29 Apr 2024 657th biinari 378 294 45ms 25 Mar 2018 658th pandapawskat 378 339 2ms 22 Sep 2021 659th labster 378 352 5ms 10 Mar 2018 660th yzhs 🇩🇪 377 295 44ms 20 Jul 2022 661st dokutan 376 296 35ms 21 Apr 2025 662nd acollett89 376 363 10ms 5 Aug 2025 663rd 0xjac 🇨🇭 376 450 281ms 9 Jun 2025 664th dijs 375 364 10ms 20 Dec 2019 664th madeforlosers 375 364 10ms 30 Nov 2023 666th marcin7Cd 375 439 5ms 5 Apr 2021 667th eiburns 373 367 10ms 8 May 2023 668th SpareManiKatti 372 367 9ms 14 Oct 2021 669th temoto 371 369 10ms 20 Sep 2018 670th CaedenHarper 🇨🇦 370 370 10ms 10 Oct 2024 671st BuBuaBu 369 412 1ms 30 Aug 2023 672nd modellking 368 362 4ms 22 Mar 2018 673rd brochmann 🇸🇪 368 372 9ms 9 Feb 2022 673rd ridingqwerty 🇺🇸 368 372 10ms 3 Dec 2023 675th scpchicken 🇵🇼 368 417 5ms 19 Apr 2023 675th dokutan 368 417 4ms 2 Apr 2024 677th PotatoSaladOverlord 367 373 10ms 16 Jan 2024 678th TheZwierzLF 🇵🇱 366 336 608ms 10 days ago 679th pickerj 366 374 10ms 5 Jun 2024 680th CheeseCake628 🇳🇴 365 337 539ms 18 Oct 2025 681st ChrisTheisen 365 364 351ms 19 Dec 2022 682nd ragerin 365 375 16ms 21 Feb 2018 683rd croc54 364 376 10ms 14 Jan 2025 684th msbranicky 363 466 309ms 31 Aug 2023 685th m42km 362 378 10ms 23 Oct 2023 685th klixel 🇨🇦 362 378 9ms 23 Jan 2025 687th Jacob385 361 341 1,658ms 1 May 2024 688th bac0id 361 368 437ms 4 Jul 2024 689th unfinishedprogram 361 378 10ms 28 Nov 2023 690th pandapawskat 360 308 2ms 27 Aug 2021 691st krencl 360 370 4ms 28 Apr 2020 692nd 4ndyJ 🇬🇧 360 380 10ms 19 Jun 2025 693rd Waffle3z 359 310 47ms 22 Jan 2021 694th mokymok 🇺🇸 359 382 10ms 1 Dec 2021 695th ian-odonnell 357 382 9ms 14 Mar 2018 696th dsntzn 🇸🇰 356 383 9ms 2 Mar 2021 697th msbranicky 355 372 4,936ms 11 Jan 2025 698th wrhm 354 387 10ms 12 Dec 2020 699th KevinMarquette 🇺🇸 353 323 258ms 23 Apr 2022 700th jackkav 353 386 10ms 14 Apr 2018 701st michelebastione 🇮🇹 351 390 10ms 21 Mar 2022 702nd CaedenHarper 🇨🇦 349 353 1,595ms 19 Jan 2025 703rd TimCurwick 🇺🇸 348 328 242ms 29 Jul 2020 704th jhpaques 🇫🇷 348 394 10ms 29 Jul 2022 705th dokutan 345 910 11ms 24 Dec 2024 706th Openstreetmapler 344 398 10ms 23 Nov 2019 707th titpetric 344 492 289ms 20 Apr 2020 708th SteveL-MSFT 343 333 255ms 10 Jun 2020 709th madex 🇩🇪 342 401 9ms 23 Jun 2024 710th msbranicky 342 409 2ms 14 Oct 2023 711th KatieLG 🇬🇧 340 390 378ms 21 Nov 2021 712th Pena86 340 403 12ms 30 Dec 2021 712th ThatAlo 340 403 10ms 12 Jun 2023 714th Mikey-Beep 🇬🇧 339 404 10ms 25 Aug 2023 715th shaunjc 338 403 9ms 10 Jun 2021 716th jotslo 🇬🇧 337 407 9ms 5 Jul 2021 717th rambox11 336 406 9ms 6 Dec 2019 718th bsoyka 🇺🇸 336 408 10ms 9 Jan 2022 719th The-Wolfson 336 539 102ms 1 Nov 2024 720th lukehewittvandy 335 470 729ms 15 Jun 2020 First Prev 641–720 of 983 Next Last
