The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Musical Chords 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 161st stefangimmillaro 685 209 148ms 13 Nov 2023 162nd nwellnhof 🇩🇪 684 162 9ms 8 Jul 2022 163rd lifthrasiir 🇰🇷 682 163 30ms 19 Nov 2024 164th emgordon154 678 222 16ms 26 Oct 2025 165th bitsandbeyond 🇳🇱 677 164 12ms 11 Nov 2025 166th kg583 🇺🇸 673 165 29ms 15 Jul 2024 167th bitsandbeyond 🇳🇱 672 214 442ms 11 Nov 2025 168th nwellnhof 🇩🇪 668 133 403ms 4 Nov 2021 169th nwellnhof 🇩🇪 667 109 3ms 13 Nov 2021 170th jared-hughes 667 166 10ms 11 Apr 2022 170th Yax42 🇫🇷 667 166 10ms 6 Sep 2025 172nd stefangimmillaro 667 315 47ms 26 Apr 2025 173rd stefangimmillaro 666 189 98ms 24 May 2024 174th primo-ppcg 🇹🇭 664 213 244ms 27 Nov 2021 175th lifthrasiir 🇰🇷 663 146 533ms 2 Dec 2024 176th inventshah 661 168 18ms 14 Nov 2022 176th sean-niemann 🇺🇸 661 168 19ms 15 days ago 178th antimon2 🇯🇵 660 123 513ms 9 Nov 2021 179th emgordon154 659 149 4,669ms 26 Oct 2025 180th kg583 🇺🇸 654 148 799ms 28 Jul 2024 181st stefangimmillaro 653 170 11ms 19 Dec 2022 182nd nwellnhof 🇩🇪 651 116 34ms 4 Nov 2021 183rd blaztoma 🇱🇹 649 250 107ms 4 days ago 184th stefangimmillaro 648 126 903ms 13 Nov 2023 185th nwellnhof 🇩🇪 647 187 2ms 4 Nov 2021 186th blaztoma 🇱🇹 642 173 11ms 4 days ago 187th NewDefectus 🇮🇱 635 175 18ms 25 Nov 2021 188th emgordon154 628 177 13ms 26 Oct 2025 189th lynn 627 249 4ms 9 Nov 2021 190th nwellnhof 🇩🇪 622 172 362ms 21 Nov 2021 191st tayloia 🇬🇧 622 178 11ms 23 May 2023 192nd GolfingSuccess 🇬🇷 621 179 11ms 25 Nov 2021 193rd stefangimmillaro 618 278 227ms 26 Nov 2024 194th albanian-laundromat 617 180 11ms 6 Nov 2025 194th anter69 🇭🇺 617 180 11ms 14 days ago 196th AdrienHache 🇫🇷 615 174 424ms 20 Aug 2025 197th jared-hughes 614 181 17ms 11 Apr 2022 198th emgordon154 612 158 576ms 26 Oct 2025 199th sean-niemann 🇺🇸 612 235 369ms 15 days ago 200th MeWhenI 🇻🇦 611 306 277ms 6 Jun 2023 201st Steffan153 🇫🇮 609 247 14ms 30 Jul 2024 202nd inventshah 608 159 541ms 22 Jan 2024 203rd itsh01 608 182 10ms 25 May 2022 204th SirBogman 🇺🇸 603 251 90ms 27 Jan 2023 205th primo-ppcg 🇹🇭 601 219 8ms 22 May 2023 206th Waffle3z 601 260 4ms 9 Nov 2021 207th orthoplex 🇨🇽 600 185 12ms 3 Nov 2021 208th sean-niemann 🇺🇸 600 474 47ms 30 Oct 2023 209th Kacarott 🇦🇺 598 236 87ms 24 days ago 210th Irratix 🇳🇱 595 186 14ms 24 Jun 2022 211th jared-hughes 592 256 427ms 17 Jul 2022 212th bitsandbeyond 🇳🇱 591 181 402ms 11 Nov 2025 213th janlelis 587 134 43ms 4 Nov 2021 214th albanian-laundromat 586 165 561ms 6 Nov 2025 215th sean-niemann 🇺🇸 583 166 487ms 15 days ago 216th stefangimmillaro 581 169 4,415ms 26 Nov 2024 217th CatsAreFluffy 579 226 52ms 12 Jan 2023 218th anter69 🇭🇺 578 136 34ms 14 days ago 219th roguh 🇬🇹 573 194 11ms 18 Oct 2024 220th annaproxy 573 364 21ms 22 Sep 2023 221st jared-hughes 570 138 43ms 12 Sep 2022 221st bitsandbeyond 🇳🇱 570 138 37ms 11 Nov 2025 223rd Sp3000 🇦🇺 570 195 11ms 20 Nov 2021 224th stefangimmillaro 569 188 427ms 10 Apr 2025 225th voytxt 🇨🇿 567 195 10ms 4 Apr 2025 226th SirBogman 🇺🇸 565 214 2ms 27 Jan 2023 227th blaztoma 🇱🇹 564 232 7ms 4 days ago 228th RockOfStone 564 277 3ms 8 Nov 2021 229th GolfingSuccess 🇬🇷 562 172 548ms 19 Jan 2024 230th MeWhenI 🇻🇦 561 198 53ms 15 Apr 2025 231st albanian-laundromat 561 259 5ms 6 Nov 2025 232nd emgordon154 556 199 10ms 26 Oct 2025 233rd MeWhenI 🇻🇦 556 219 137ms 5 Nov 2021 234th snoozingnewt 🇨🇦 550 202 17ms 12 days ago 235th duckyluuk 🇳🇱 545 204 31ms 15 Jul 2024 236th vishwathg 542 205 55ms 27 Sep 2022 237th Natanaelel 🇸🇪 535 147 35ms 5 Sep 2024 238th MeWhenI 🇻🇦 534 390 17ms 18 Nov 2021 239th primo-ppcg 🇹🇭 533 187 24ms 11 Feb 2022 240th MeWhenI 🇻🇦 531 148 55ms 14 Aug 2022 First Prev 161–240 of 594 Next Last