The Calendar hole will go live in approximately 8 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 241st ovs-code 🇩🇪 639 134 563ms 5 Aug 2024 242nd user189032 639 278 127ms 29 May 2019 243rd jared-hughes 638 208 474ms 30 Aug 2022 244th MeWhenI 🇻🇦 637 144 1,130ms 12 May 2023 245th lynn 636 242 139ms 17 Aug 2021 246th wh3n3v3r 🇨🇿 635 140 10ms 18 Nov 2024 247th inventshah 635 162 6ms 3 Dec 2022 248th MeWhenI 🇻🇦 634 82 44ms 27 Jan 2023 249th sisyphus-ppcg 🇦🇺 634 135 525ms 17 Jan 2024 250th emplv 🇱🇻 634 164 7ms 3 Oct 2023 251st MarcMush 🇫🇷 633 117 1,619ms 4 Feb 2024 251st antimon2 🇯🇵 633 117 907ms 29 Sep 2025 253rd tdkkdt 🇷🇺 631 216 397ms 21 Nov 2021 254th GrayJoKing 🇦🇺 630 108 40ms 10 Aug 2023 255th MeWhenI 🇻🇦 630 154 9ms 26 Feb 2025 256th okhoel 🇳🇴 628 144 256ms 30 Sep 2022 257th neel11235813 626 142 17ms 26 Jan 2023 258th jared-hughes 626 155 10ms 14 Jan 2023 259th janbehrens 🇩🇪 626 175 5ms 9 Jun 2021 260th jupj 🇫🇮 624 205 2ms 26 Aug 2022 261st dokutan 622 161 7ms 31 Oct 2024 262nd MeWhenI 🇻🇦 616 148 806ms 15 Sep 2025 263rd edsrzf 🇳🇿 615 169 7ms 3 Sep 2024 264th xkacer 🇨🇿 614 158 10ms 25 Jan 2021 265th yzhs 🇩🇪 613 145 9ms 25 Oct 2020 266th jared-hughes 612 200 4ms 28 Feb 2022 267th neel11235813 611 140 409ms 31 Mar 2024 268th stefangimmillaro 611 170 7ms 6 Feb 2023 269th jakobkordez 🇸🇮 609 146 10ms 31 Oct 2022 269th stefangimmillaro 609 146 14ms 6 Feb 2023 271st edsrzf 🇳🇿 609 201 2ms 17 Apr 2025 272nd rucin93 🇵🇱 607 144 142ms 23 Jan 2025 273rd MeWhenI 🇻🇦 607 149 251ms 28 Jan 2023 274th Steffan153 🇫🇮 606 107 145ms 28 Jul 2024 275th Sp3000 🇦🇺 606 145 3ms 10 May 2021 276th Waffle3z 606 202 3ms 8 Apr 2022 277th ovs-code 🇩🇪 602 113 38ms 22 Feb 2025 277th error256 602 113 53ms 28 May 2025 279th Irratix 🇳🇱 600 221 3,063ms 11 Jan 2023 280th MeWhenI 🇻🇦 599 209 594ms 27 Jan 2023 281st stefangimmillaro 597 114 36ms 26 Dec 2024 282nd thisishowmymindworks 🇳🇴 592 164 10ms 8 Jun 2023 283rd snoozingnewt 🇨🇦 592 261 89ms 20 Nov 2025 284th Kacarott 🇦🇺 588 201 205ms 24 Sep 2024 285th MeWhenI 🇻🇦 586 146 625ms 13 Jul 2024 286th bricknellj 585 152 14ms 31 Jul 2024 286th CopperyMarrow15 585 152 15ms 24 Aug 2025 288th ovs-code 🇩🇪 584 89 56ms 12 Nov 2025 289th jacklynnepenick 581 153 11ms 15 Aug 2021 290th Shanethegamer 🇺🇸 581 474 488ms 13 Apr 2025 291st jacklynnepenick 578 152 3ms 29 Aug 2021 292nd annaproxy 578 154 9ms 18 Jan 2023 293rd tayloia 🇬🇧 578 168 9ms 17 May 2023 294th snoozingnewt 🇨🇦 573 240 160ms 40 hours ago 295th olivermrose 🇺🇸 567 120 55ms 28 Oct 2021 296th MeWhenI 🇻🇦 566 439 1,812ms 7 Nov 2025 297th blaztoma 🇱🇹 563 158 10ms 2 days ago 298th Lv0Sys 🇵🇱 561 173 10ms 2 days ago 299th dokutan 560 230 521ms 9 Nov 2025 300th 5cw 🇺🇸 559 159 14ms 7 Aug 2025 301st KatieLG 🇬🇧 559 442 2ms 22 Apr 2025 302nd fajost 556 160 14ms 8 Sep 2020 303rd MeWhenI 🇻🇦 554 202 14ms 27 Jan 2023 304th ryyyn 🇺🇸 552 161 15ms 5 days ago 305th MeWhenI 🇻🇦 550 189 7ms 28 Jan 2023 306th acotis 550 324 274ms 19 Mar 2025 307th CaedenHarper 🇨🇦 548 156 813ms 1 Aug 2025 308th IISResetMe 548 165 296ms 20 days ago 309th C0de5mith 🇺🇸 548 177 9ms 19 Sep 2022 310th NerdyMcNerd42 546 163 10ms 18 Feb 2023 311th helbling 🇨🇭 545 178 10ms 14 Sep 2024 312th dokutan 545 188 4,119ms 8 Sep 2025 313th error256 544 160 76ms 24 May 2025 314th Natanaelel 🇸🇪 543 169 1,238ms 22 Jan 2023 315th evan-schiewe 543 251 360ms 21 Nov 2021 316th CaedenHarper 🇨🇦 542 164 9ms 1 Aug 2025 317th Natanaelel 🇸🇪 542 179 9ms 22 Jan 2023 318th janbehrens 🇩🇪 541 252 360ms 10 Jan 2022 319th GrayJoKing 🇦🇺 540 474 2ms 14 Nov 2020 320th adamnielson42 🇺🇸 539 165 10ms 26 May 2023 First Prev 241–320 of 871 Next Last