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 321st janbehrens 🇩🇪 697 172 275ms 13 Jul 2022 322nd rzv-me 697 191 4ms 30 Sep 2024 323rd lynn 696 115 3ms 27 May 2022 324th mrxz 🇳🇱 696 196 9ms 27 Jun 2019 325th DialFrost 🇸🇬 693 173 378ms 21 Feb 2024 326th MeWhenI 🇻🇦 692 192 5ms 12 Aug 2024 327th albanian-laundromat 692 228 41ms 13 days ago 328th janbehrens 🇩🇪 689 193 5ms 2 Jul 2023 329th Informagier 688 199 16ms 16 Sep 2020 330th stefangimmillaro 686 255 189ms 13 Nov 2023 331st MeWhenI 🇻🇦 686 264 46ms 4 Sep 2024 332nd tayloia 🇬🇧 685 199 10ms 17 Jan 2023 333rd snoozingnewt 🇨🇦 685 200 9ms 20 days ago 334th Ripick 685 234 432ms 11 Aug 2024 335th stefangimmillaro 684 194 370ms 11 Oct 2023 336th olivermrose 🇺🇸 682 163 43ms 4 Feb 2022 337th m-tkach 🇺🇦 681 201 10ms 13 Feb 2023 338th emgordon154 680 178 1,028ms 20 Aug 2024 339th KatieLG 🇬🇧 680 181 509ms 19 Apr 2025 340th dokutan 679 232 581ms 24 Sep 2025 341st jacklynnepenick 678 202 10ms 28 Aug 2021 342nd MeWhenI 🇻🇦 676 207 1ms 13 Oct 2023 343rd MeWhenI 🇻🇦 673 161 2ms 16 Apr 2023 344th annaproxy 671 229 16ms 22 Feb 2023 345th dokutan 670 356 3ms 15 days ago 346th albanian-laundromat 669 172 948ms 25 days ago 347th voytxt 🇨🇿 669 204 10ms 30 Jul 2024 347th emgordon154 669 204 10ms 9 Aug 2024 349th albanian-laundromat 669 240 2ms 6 Nov 2025 350th o0lit3 🇺🇸 668 162 3ms 14 Oct 2020 351st lelbal 668 205 9ms 8 Oct 2024 352nd KatieLG 🇬🇧 666 167 43ms 10 Apr 2022 352nd Lv0Sys 🇵🇱 666 167 47ms 18 days ago 354th MeWhenI 🇻🇦 665 173 820ms 15 Sep 2025 355th dokutan 665 185 386ms 6 Nov 2024 356th KatieLG 🇬🇧 665 205 10ms 16 Apr 2021 357th StardustGogeta 665 206 16ms 5 Aug 2020 357th zbreit 🇺🇸 665 206 10ms 5 Aug 2020 357th rschwa6308 🇺🇸 665 206 11ms 6 Aug 2020 360th albanian-laundromat 662 207 9ms 6 Nov 2025 361st h3ra993huskp 🇯🇵 662 238 660ms 18 days ago 362nd janbehrens 🇩🇪 661 201 348ms 17 Jun 2023 363rd scpchicken 🇵🇼 660 164 2ms 25 Feb 2023 364th bluebear94 659 175 277ms 2 Mar 2018 365th dokutan 659 182 328ms 6 Nov 2024 366th inventshah 658 185 278ms 12 Jul 2022 367th thisishowmymindworks 🇳🇴 656 208 10ms 5 Oct 2020 368th sambirnbaum1 652 210 10ms 13 Oct 2019 368th j-Ewan 652 210 11ms 3 Mar 2022 370th user189032 650 210 10ms 29 May 2019 371st blaztoma 🇱🇹 649 211 9ms 2 Oct 2025 372nd emgordon154 647 172 38ms 20 Aug 2024 373rd scpchicken 🇵🇼 647 178 227ms 25 Feb 2023 374th BambooleanLogic 🇸🇪 647 211 9ms 19 Oct 2022 375th davitf 646 212 10ms 31 Oct 2018 375th RYNO8 646 212 10ms 14 Oct 2021 375th CornerMercury 🇬🇧 646 212 10ms 4 Nov 2025 378th dokutan 645 249 2ms 8 Sep 2025 379th KatieLG 🇬🇧 644 428 3ms 16 Jan 2023 380th Lv0Sys 🇵🇱 643 212 9ms 18 days ago 381st Troon 643 213 9ms 18 Apr 2025 382nd janbehrens 🇩🇪 643 217 478ms 24 Mar 2022 383rd stuartcarnie 642 282 199ms 18 Apr 2020 384th snoozingnewt 🇨🇦 641 192 436ms 20 days ago 385th tdkkdt 🇷🇺 641 207 381ms 21 Nov 2021 386th phdphil 640 180 128ms 9 Apr 2018 387th marcin7Cd 640 214 10ms 14 Mar 2020 387th Pulencode 🇨🇨 640 214 9ms 17 Nov 2024 389th dokutan 639 207 3,566ms 6 Nov 2024 390th dloscutoff 634 189 872ms 23 Nov 2018 391st msrawson 631 217 9ms 1 Sep 2018 391st PatrickStephansen 🇿🇦 631 217 16ms 23 Aug 2023 393rd janbehrens 🇩🇪 630 250 565ms 27 Jul 2022 394th roavin 629 211 355ms 23 Jun 2022 395th emgordon154 628 210 141ms 9 Aug 2024 396th Indivicivet 628 218 17ms 19 Oct 2021 397th dokutan 627 223 2ms 26 Sep 2025 398th dokutan 626 184 795ms 29 Aug 2025 399th primo-ppcg 🇹🇭 625 252 707ms 18 Oct 2021 400th hoodadam 623 220 10ms 12 Jun 2019 First Prev 321–400 of 983 Next Last