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 401st annaproxy 521 179 9ms 22 Feb 2023 402nd abailey2020 🇺🇸 518 180 9ms 18 Aug 2020 402nd ydevor 🇮🇱 518 180 10ms 16 Feb 2021 402nd Omega65536 🇩🇪 518 180 9ms 10 Aug 2025 402nd robin-scragg 518 180 10ms 18 Oct 2025 406th dokutan 518 199 3,566ms 6 Nov 2024 407th emgordon154 518 280 4ms 28 Dec 2024 408th BREMAUCY 🇫🇷 515 207 351ms 20 Jan 2023 409th alexsave 514 212 10ms 7 days ago 410th MeWhenI 🇻🇦 514 594 11ms 10 Feb 2025 411th didroe 513 157 50ms 20 Nov 2024 412th violeta-desantis 513 235 2ms 17 Apr 2024 413th dzhang314 512 182 16ms 15 Aug 2019 413th davecame 512 182 9ms 22 Nov 2023 415th commandblockguy 🇺🇸 511 169 782ms 1 Sep 2025 416th c0d3-4-F00d 🇩🇪 511 236 2ms 5 Jun 2023 417th commandblockguy 🇺🇸 509 183 17ms 30 Apr 2023 418th gastropner 508 237 2ms 25 Dec 2020 419th NewDefectus 🇮🇱 507 184 10ms 1 Nov 2021 419th janbehrens 🇩🇪 507 184 10ms 17 Jun 2023 419th Troon 507 184 9ms 18 Apr 2025 422nd Lv0Sys 🇵🇱 506 159 47ms 21 days ago 423rd mtirado1 506 292 2ms 7 May 2023 424th janbehrens 🇩🇪 505 255 3ms 9 Jun 2021 425th elgan65536 505 337 252ms 10 Nov 2023 426th qpwoeirut 504 185 10ms 20 Oct 2025 427th dokutan 501 174 697ms 6 Nov 2024 428th quimey 501 186 10ms 17 Jul 2023 428th BREMAUCY 🇫🇷 501 186 9ms 21 Aug 2025 430th scpchicken 🇵🇼 500 213 357ms 6 Apr 2022 431st skps2010 500 218 9ms 29 Dec 2018 431st raphaelimahorn 500 218 9ms 18 Aug 2021 433rd CedricGebistorf 499 187 9ms 4 Mar 2022 433rd pyrolitic 🇮🇪 499 187 17ms 6 Apr 2022 433rd ahmetdemirag 🇨🇾 499 187 10ms 19 Nov 2024 436th FortuiteMan 🇫🇷 496 188 14ms 3 days ago 437th rvdnieuwendijk 🇳🇱 496 193 272ms 26 Jun 2020 438th snoozingnewt 🇨🇦 494 315 2ms 9 Nov 2025 439th bricknellj 493 701 2ms 3 May 2024 440th MichalMarsalek 🇨🇿 492 309 385ms 4 Sep 2022 441st SniperSmiley 🇺🇸 491 190 10ms 23 Jun 2021 442nd ArmaanAS 491 222 10ms 25 Mar 2021 443rd KatieLG 🇬🇧 488 165 43ms 10 Apr 2022 444th Informagier 488 191 16ms 16 Sep 2020 445th guliyevemil1 🇦🇿 486 332 310ms 18 Apr 2020 446th dloscutoff 484 180 872ms 23 Nov 2018 447th PatrickStephansen 🇿🇦 483 193 16ms 23 Aug 2023 448th bwat2 482 287 505ms 10 Feb 2022 449th janAkali 🇷🇺 482 315 331ms 10 Sep 2024 450th ToriTheChicken 480 227 10ms 2 Aug 2020 451st RaBa21 🇭🇺 478 195 17ms 14 Jul 2025 452nd Mabeloid 🇳🇴 476 196 9ms 21 Sep 2024 453rd emgordon154 474 170 38ms 20 Aug 2024 454th m-tkach 🇺🇦 471 198 9ms 13 Feb 2023 455th kevinmchung 469 199 17ms 24 Feb 2018 456th MeWhenI 🇻🇦 467 241 3ms 25 May 2022 457th SB-945 466 200 18ms 4 Sep 2023 457th Jacob385 466 200 10ms 1 May 2024 459th annaproxy 465 229 360ms 3 May 2022 460th coreynash 464 235 9ms 28 May 2024 461st sambirnbaum1 462 202 10ms 13 Oct 2019 462nd dokutan 460 175 52ms 23 Apr 2025 463rd blaztoma 🇱🇹 459 203 9ms 2 Oct 2025 464th Yewzir 🇧🇪 459 321 7ms 26 Dec 2024 465th StefanHabel 🇨🇦 457 204 16ms 17 Sep 2023 466th Lv0Sys 🇵🇱 456 191 303ms 21 days ago 467th davitf 453 206 10ms 31 Oct 2018 468th janbehrens 🇩🇪 452 300 440ms 20 Nov 2022 469th zakariamouhid 450 242 9ms 4 Jun 2023 470th skps2010 448 208 16ms 29 Dec 2018 470th yzhs 🇩🇪 448 208 10ms 25 Oct 2020 472nd proton 🇩🇪 447 180 48ms 20 Jun 2020 473rd msrawson 446 209 9ms 1 Sep 2018 474th Andrey-Plotnikov 445 245 9ms 9 Nov 2024 475th MeWhenI 🇻🇦 442 155 2ms 16 Apr 2023 476th andrewjc2000 442 211 10ms 18 Jul 2025 477th Jacob385 441 196 430ms 1 May 2024 477th Mabeloid 🇳🇴 441 196 816ms 21 Sep 2024 479th scpchicken 🇵🇼 440 156 2ms 25 Feb 2023 480th hoodadam 440 212 10ms 12 Jun 2019 First Prev 401–480 of 978 Next Last