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 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 561st pandapawskat 362 333 2ms 2 Sep 2021 562nd strattonwhisler 361 302 10ms 22 Apr 2022 563rd Kees-van-Beilen 360 303 10ms 14 May 2023 564th Bonjour27891 🇻🇳 359 260 12ms 10 Apr 2022 565th Babafaba 357 242 688ms 11 Nov 2025 566th ImpressedByRocks 357 261 14ms 19 Sep 2022 567th neihousaigaai 357 388 636ms 18 May 2021 568th InigoK 🇺🇸 356 262 10ms 15 Jun 2023 569th junkondo-jp 355 307 10ms 11 Jun 2024 570th EnviloN 🇨🇿 354 263 9ms 20 Oct 2024 570th JunkIce 354 263 16ms 12 Feb 2025 572nd scpchicken 🇵🇼 354 409 5ms 19 Apr 2023 573rd msbranicky 353 264 22ms 3 Jul 2023 574th omurakazuaki 🇯🇵 352 310 9ms 13 Feb 2021 574th eranws 352 310 9ms 24 Oct 2022 576th msbranicky 352 458 309ms 31 Aug 2023 577th marcin7Cd 351 431 5ms 5 Apr 2021 578th gotbadger 349 231 50ms 21 Nov 2024 579th smclaughlin-cf 349 312 9ms 15 Apr 2025 580th fgrosshans 🇫🇷 348 268 11ms 9 Jul 2024 581st ericlangedijk 🇸🇮 348 306 367ms 18 Mar 2022 582nd johnkiernander 348 313 10ms 9 days ago 583rd yokasuretsu 347 269 10ms 19 Apr 2018 584th MeWhenI 🇻🇦 346 273 156ms 3 Aug 2024 585th pandapawskat 346 306 2ms 27 Aug 2021 586th lukasmoellerch 345 316 9ms 15 Jul 2019 586th 1231234md5 🇨🇳 345 316 9ms 29 Jan 2024 588th nullie 343 272 10ms 9 Jun 2022 589th mintypython 342 319 9ms 19 Oct 2018 590th blaztoma 🇱🇹 341 201 3ms 22 Oct 2025 591st dokutan 340 278 122ms 21 Aug 2024 592nd dokutan 338 902 11ms 24 Dec 2024 593rd jahakari 337 316 356ms 21 Nov 2021 594th gnlow 🇰🇷 336 324 9ms 25 Apr 2020 595th msbranicky 335 401 2ms 14 Oct 2023 596th eshilo-draper 334 279 9ms 21 Sep 2022 596th Ythaenagor 334 279 10ms 5 Aug 2024 598th Florian-Mt 334 326 9ms 13 Nov 2023 599th graft 333 242 43ms 11 Mar 2018 600th geofft 333 280 10ms 14 Dec 2020 601st titpetric 333 484 289ms 20 Apr 2020 602nd Re-Adventures 🇮🇳 332 281 11ms 10 Oct 2020 603rd luuumine 🇫🇷 331 282 10ms 27 Oct 2025 604th yokasuretsu 330 244 48ms 19 Apr 2018 605th juliansiebert 🇩🇪 330 290 325ms 15 Jun 2025 606th dokutan 330 427 95ms 13 Sep 2025 607th labster 329 344 5ms 10 Mar 2018 608th JunkIce 328 263 416ms 12 Feb 2025 609th neihousaigaai 327 285 10ms 27 Dec 2021 610th pg98 327 333 9ms 5 Sep 2019 611th alemelis 326 267 1,136ms 4 Mar 2024 612th The-Wolfson 325 531 102ms 1 Nov 2024 613th shreyasminocha 323 337 10ms 2 Aug 2020 614th not-optikk 🇺🇸 323 457 2ms 16 Oct 2020 615th msbranicky 322 268 1,048ms 17 Jan 2024 616th guilhem-roy 🇫🇷 320 291 10ms 3 Mar 2022 617th evanrittner 319 292 12ms 26 Feb 2021 617th randolchance 319 292 12ms 20 Jun 2025 619th bac0id 319 334 422ms 4 Jul 2024 620th modellking 319 354 4ms 22 Mar 2018 621st jmerle 🇳🇱 317 294 10ms 11 Jul 2023 622nd kjhughes097 🇬🇧 317 336 370ms 9 Dec 2020 623rd dokutan 317 877 990ms 12 Jan 2025 624th martinnorling 🇸🇪 315 296 9ms 22 Feb 2022 625th arcpolaris 315 338 452ms 11 Nov 2025 626th ozkxr 315 346 9ms 27 Apr 2020 627th relet 314 297 14ms 9 Aug 2018 628th tomh1012 314 339 400ms 21 Sep 2022 629th mizuzimu 313 298 10ms 12 Apr 2020 630th alangodfrey 312 299 16ms 31 Jan 2019 630th ianpoe 312 299 12ms 20 Apr 2020 632nd krencl 312 362 4ms 28 Apr 2020 633rd mbittner20 310 301 10ms 21 Jan 2024 634th zdzc 308 303 16ms 30 Mar 2018 635th kypi 307 304 10ms 20 Feb 2020 635th lhulinsky 307 304 9ms 22 Oct 2024 637th acollett89 307 355 10ms 5 Aug 2025 638th GalladeGuy 🇺🇸 307 481 1ms 3 Sep 2018 639th dijs 306 356 10ms 20 Dec 2019 639th madeforlosers 306 356 10ms 30 Nov 2023 First Prev 561–640 of 978 Next Last
