The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Morse Decoder 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 dokutan 439 199 131ms 8 Sep 2025 402nd Natanaelel 🇸🇪 436 204 15ms 20 Jan 2023 403rd quimey 434 205 10ms 17 Jul 2023 404th janbehrens 🇩🇪 433 297 695ms 7 Jan 2021 405th KatieLG 🇬🇧 432 198 421ms 6 Oct 2025 406th guilhem-roy 🇫🇷 430 207 10ms 25 Feb 2022 406th RDShah 430 207 9ms 16 Jan 2023 406th Pyroan 430 207 9ms 2 Mar 2025 409th janbehrens 🇩🇪 426 209 10ms 17 Jun 2023 410th janAkali 🇷🇺 426 391 380ms 2 Jun 2025 411th lynn 424 143 3ms 20 Apr 2021 412th za3k 424 210 9ms 13 Oct 2022 412th Babafaba 424 210 10ms 23 Nov 2025 414th c0d3-4-F00d 🇩🇪 423 302 2ms 11 Feb 2022 415th commandblockguy 🇺🇸 422 203 1,132ms 1 Sep 2025 416th nullie 422 211 9ms 9 Jun 2022 417th arctouch-cristiannevianna 421 324 354ms 1 Mar 2024 418th kaascevich 421 367 347ms 14 Sep 2025 419th commandblockguy 🇺🇸 418 213 14ms 6 Apr 2023 420th viv511 417 318 1,392ms 16 Feb 2025 421st The3gs 416 214 10ms 13 Oct 2020 421st RaBa21 🇭🇺 416 214 16ms 18 Jul 2025 423rd Schmitt-Very-Cool 415 310 587ms 3 Oct 2025 424th sambirnbaum1 414 215 17ms 13 Oct 2019 424th cros107 🇦🇺 414 215 16ms 10 Sep 2025 424th Lv0Sys 🇵🇱 414 215 12ms 21 days ago 427th dokutan 414 354 91ms 4 Feb 2025 428th MeWhenI 🇻🇦 412 147 3ms 16 Apr 2023 429th Mabeloid 🇳🇴 412 216 10ms 12 Sep 2024 430th hoodadam 410 217 10ms 11 Jun 2019 430th abailey2020 🇺🇸 410 217 10ms 19 Aug 2020 430th CedricGebistorf 410 217 9ms 20 Feb 2022 430th SB-945 410 217 10ms 10 Mar 2024 434th Babafaba 407 210 396ms 23 Nov 2025 435th Troon 406 219 14ms 21 Oct 2022 436th andrewjc2000 404 220 10ms 16 Jul 2025 437th janbehrens 🇩🇪 403 184 716ms 11 Jul 2023 438th hyvyys 403 241 10ms 18 Sep 2020 439th Lv0Sys 🇵🇱 402 169 37ms 21 days ago 440th Starwort 🇬🇧 401 222 10ms 10 Feb 2020 441st jerrandolph 399 472 287ms 21 Apr 2020 442nd Natanaelel 🇸🇪 398 152 5ms 12 Feb 2023 443rd lukechampine 397 474 332ms 19 Apr 2020 444th Lv0Sys 🇵🇱 396 187 651ms 21 days ago 445th Mabeloid 🇳🇴 396 216 666ms 17 Sep 2024 446th pyrolitic 🇮🇪 395 225 10ms 6 Apr 2022 447th snoozingnewt 🇨🇦 395 326 499ms 4 Nov 2025 448th alangodfrey 394 226 9ms 31 Jan 2019 449th Yewzir 🇧🇪 394 405 2ms 18 Oct 2023 450th knutae 🇳🇴 392 227 10ms 21 Aug 2021 451st hamhub7 392 348 372ms 18 Aug 2022 452nd blaztoma 🇱🇹 391 155 3ms 22 Oct 2025 453rd vezzick 390 228 9ms 6 Mar 2021 454th didion0 🇺🇸 390 249 9ms 1 Dec 2021 455th kevinmchung 388 229 12ms 24 Feb 2018 456th msrawson 387 230 10ms 2 Sep 2018 456th ydevor 🇮🇱 387 230 9ms 16 Feb 2021 458th ArmaanAS 387 251 10ms 25 Mar 2021 459th ToriTheChicken 384 253 10ms 2 Aug 2020 460th bastienvoirin 🇫🇷 383 232 9ms 5 Apr 2020 461st jameswmccarty 382 233 9ms 7 Mar 2025 462nd bac0id 381 358 417ms 4 Jul 2024 463rd TheDrawingCoder-Gamer 380 322 2ms 6 Jul 2025 464th ericlangedijk 🇸🇮 379 360 356ms 19 Mar 2022 465th CarsonChr 🇺🇸 376 362 366ms 21 Jan 2025 466th ImpressedByRocks 375 237 20ms 20 Sep 2022 467th MeWhenI 🇻🇦 375 354 1,336ms 30 Oct 2023 468th benwilliamgraham 374 238 10ms 10 Nov 2021 469th wh3n3v3r 🇨🇿 373 260 9ms 11 Nov 2024 470th MeWhenI 🇻🇦 373 738 665ms 9 Feb 2025 471st masinag 🇮🇹 371 345 2ms 5 Nov 2024 472nd dokutan 371 742 724ms 12 Jan 2025 473rd ArmaanAS 369 241 11ms 25 Mar 2021 474th yuchuehw 366 243 9ms 4 Jan 2024 474th CLOStrophobic 🇮🇹 366 243 13ms 26 Jan 2025 474th Flekay 🇩🇪 366 243 9ms 11 Jul 2025 477th guliyevemil1 🇦🇿 365 515 339ms 16 Apr 2020 478th frederikb 364 354 605ms 9 Sep 2020 479th bstrautin 363 249 257ms 5 Jun 2020 480th fuchen 362 421 1,440ms 11 May 2020 First Prev 401–480 of 871 Next Last
