The Calendar hole will go live in approximately 6 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 0xjac 🇨🇭 365 442 281ms 9 Jun 2025 562nd tobeannouncd 364 491 128ms 29 Apr 2024 563rd pandapawskat 362 333 2ms 2 Sep 2021 564th strattonwhisler 361 302 10ms 22 Apr 2022 565th Kees-van-Beilen 360 303 10ms 14 May 2023 566th Bonjour27891 🇻🇳 359 260 12ms 10 Apr 2022 567th Babafaba 357 242 688ms 11 Nov 2025 568th ImpressedByRocks 357 261 14ms 19 Sep 2022 569th neihousaigaai 357 388 636ms 18 May 2021 570th InigoK 🇺🇸 356 262 10ms 15 Jun 2023 571st junkondo-jp 355 307 10ms 11 Jun 2024 572nd EnviloN 🇨🇿 354 263 9ms 20 Oct 2024 572nd JunkIce 354 263 16ms 12 Feb 2025 574th scpchicken 🇵🇼 354 409 5ms 19 Apr 2023 575th msbranicky 353 264 22ms 3 Jul 2023 576th omurakazuaki 🇯🇵 352 310 9ms 13 Feb 2021 576th eranws 352 310 9ms 24 Oct 2022 578th msbranicky 352 458 309ms 31 Aug 2023 579th marcin7Cd 351 431 5ms 5 Apr 2021 580th gotbadger 349 231 39ms 21 Nov 2024 581st smclaughlin-cf 349 312 9ms 15 Apr 2025 582nd fgrosshans 🇫🇷 348 268 11ms 9 Jul 2024 583rd ericlangedijk 🇸🇮 348 306 367ms 18 Mar 2022 584th johnkiernander 348 313 10ms 13 days ago 585th yokasuretsu 347 269 10ms 19 Apr 2018 586th MeWhenI 🇻🇦 346 273 156ms 3 Aug 2024 587th pandapawskat 346 306 2ms 27 Aug 2021 588th lukasmoellerch 345 316 9ms 15 Jul 2019 588th 1231234md5 🇨🇳 345 316 9ms 29 Jan 2024 590th nullie 343 272 10ms 9 Jun 2022 591st mintypython 342 319 9ms 19 Oct 2018 592nd blaztoma 🇱🇹 341 201 3ms 22 Oct 2025 593rd dokutan 340 278 122ms 21 Aug 2024 594th dokutan 338 902 11ms 24 Dec 2024 595th jahakari 337 316 356ms 21 Nov 2021 596th gnlow 🇰🇷 336 324 9ms 25 Apr 2020 597th msbranicky 335 401 2ms 14 Oct 2023 598th eshilo-draper 334 279 9ms 21 Sep 2022 598th Ythaenagor 334 279 10ms 5 Aug 2024 600th Florian-Mt 334 326 9ms 13 Nov 2023 601st graft 333 242 45ms 11 Mar 2018 602nd geofft 333 280 10ms 14 Dec 2020 603rd titpetric 333 484 289ms 20 Apr 2020 604th Re-Adventures 🇮🇳 332 281 11ms 10 Oct 2020 605th luuumine 🇫🇷 331 282 10ms 27 Oct 2025 606th yokasuretsu 330 244 48ms 19 Apr 2018 607th juliansiebert 🇩🇪 330 290 325ms 15 Jun 2025 608th dokutan 330 427 95ms 13 Sep 2025 609th labster 329 344 5ms 10 Mar 2018 610th JunkIce 328 263 416ms 12 Feb 2025 611th neihousaigaai 327 285 10ms 27 Dec 2021 612th pg98 327 333 9ms 5 Sep 2019 613th alemelis 326 267 963ms 4 Mar 2024 614th The-Wolfson 325 531 102ms 1 Nov 2024 615th mwarvik 🇳🇴 323 330 438ms 6 hours ago 616th shreyasminocha 323 337 10ms 2 Aug 2020 617th not-optikk 🇺🇸 323 457 2ms 16 Oct 2020 618th msbranicky 322 268 1,048ms 17 Jan 2024 619th guilhem-roy 🇫🇷 320 291 10ms 3 Mar 2022 620th evanrittner 319 292 12ms 26 Feb 2021 620th randolchance 319 292 12ms 20 Jun 2025 622nd bac0id 319 334 422ms 4 Jul 2024 623rd modellking 319 354 6ms 22 Mar 2018 624th jmerle 🇳🇱 317 294 10ms 11 Jul 2023 625th kjhughes097 🇬🇧 317 336 370ms 9 Dec 2020 626th dokutan 317 877 849ms 12 Jan 2025 627th martinnorling 🇸🇪 315 296 9ms 22 Feb 2022 628th arcpolaris 315 338 421ms 11 Nov 2025 629th ozkxr 315 346 9ms 27 Apr 2020 630th relet 314 297 14ms 9 Aug 2018 631st tomh1012 314 339 400ms 21 Sep 2022 632nd mizuzimu 313 298 10ms 12 Apr 2020 633rd alangodfrey 312 299 16ms 31 Jan 2019 633rd ianpoe 312 299 12ms 20 Apr 2020 635th krencl 312 362 5ms 28 Apr 2020 636th mbittner20 310 301 10ms 21 Jan 2024 637th zdzc 308 303 16ms 30 Mar 2018 638th kypi 307 304 10ms 20 Feb 2020 638th lhulinsky 307 304 9ms 22 Oct 2024 640th acollett89 307 355 10ms 5 Aug 2025 First Prev 561–640 of 981 Next Last
