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 241st MeWhenI 🇻🇦 529 297 5ms 2 Oct 2022 242nd KatieLG 🇬🇧 526 211 11ms 3 Oct 2025 243rd jared-hughes 526 230 2ms 17 Jul 2022 244th namelessiw 525 204 449ms 8 Aug 2025 245th janbehrens 🇩🇪 523 250 11ms 2 Jul 2023 246th ahmetdemirag 🇨🇾 522 213 10ms 25 Nov 2024 247th emgordon154 521 96 77ms 27 days ago 248th MeWhenI 🇻🇦 520 247 175ms 15 Dec 2022 249th duckyluuk 🇳🇱 517 187 759ms 15 Jul 2024 250th emgordon154 517 215 155ms 13 May 2025 251st MeWhenI 🇻🇦 515 188 522ms 13 Jul 2024 252nd Argeento 🇵🇱 515 215 10ms 9 Sep 2023 253rd NewDefectus 🇮🇱 515 235 2ms 27 Nov 2021 254th MeWhenI 🇻🇦 515 408 44ms 29 Apr 2025 255th edsrzf 🇳🇿 514 364 263ms 26 days ago 256th MeWhenI 🇻🇦 512 239 455ms 5 Mar 2022 257th MichalMarsalek 🇨🇿 503 260 383ms 7 Nov 2021 258th MeWhenI 🇻🇦 503 262 5ms 6 Aug 2023 259th KatieLG 🇬🇧 501 221 10ms 3 Oct 2025 260th roguh 🇬🇹 499 194 555ms 18 Oct 2024 260th snoozingnewt 🇨🇦 499 194 732ms 12 days ago 262nd MeWhenI 🇻🇦 497 263 7ms 3 Jul 2023 263rd RYNO8 494 225 17ms 10 Nov 2021 264th MeWhenI 🇻🇦 494 294 8ms 10 Sep 2022 265th MeWhenI 🇻🇦 490 102 71ms 25 Aug 2022 266th MarcMush 🇫🇷 489 166 868ms 18 Jan 2024 267th inventshah 489 310 69ms 9 Feb 2023 268th InigoK 🇺🇸 487 228 27ms 23 Sep 2025 269th CornerMercury 🇬🇧 485 229 48ms 44 hours ago 270th KatieLG 🇬🇧 483 163 56ms 3 Oct 2025 271st janbehrens 🇩🇪 481 231 11ms 17 Jun 2023 271st ZakkkkAttackkkk 🇵🇭 481 231 54ms 19 Feb 2025 271st ndren 481 231 12ms 22 days ago 274th MeWhenI 🇻🇦 481 299 495ms 7 Nov 2025 275th MeWhenI 🇻🇦 480 400 32ms 6 Jun 2023 276th MeWhenI 🇻🇦 479 203 7ms 16 Aug 2024 277th didion0 🇺🇸 479 231 13ms 28 Feb 2022 278th o0lit3 🇺🇸 478 152 8ms 27 Nov 2021 279th Lv0Sys 🇵🇱 477 165 37ms 13 days ago 280th Waffle3z 471 167 44ms 9 Nov 2021 281st janbehrens 🇩🇪 471 235 11ms 8 Jun 2023 282nd MeWhenI 🇻🇦 470 320 10ms 12 Apr 2024 283rd MeWhenI 🇻🇦 469 174 1,153ms 9 Nov 2021 284th elgan65536 469 366 423ms 10 Apr 2024 285th Lv0Sys 🇵🇱 465 239 18ms 13 days ago 286th scpchicken 🇵🇼 463 157 22ms 25 Feb 2023 287th Pyroan 463 240 19ms 15 Mar 2025 288th Carltoffel 🇩🇪 462 455 49ms 24 Feb 2025 289th tobeannouncd 461 302 160ms 8 Jan 2024 290th KatieLG 🇬🇧 459 211 787ms 3 Oct 2025 291st MeWhenI 🇻🇦 456 533 1,696ms 7 Nov 2025 292nd helbling 🇨🇭 453 244 10ms 21 Oct 2024 293rd StefanHabel 🇨🇦 453 245 18ms 29 Aug 2023 294th jared-hughes 452 167 33ms 3 Nov 2021 295th DialFrost 🇸🇬 452 246 19ms 20 May 2024 296th yzhs 🇩🇪 450 247 18ms 23 Jun 2023 296th neel11235813 450 247 18ms 24 Nov 2023 298th MeWhenI 🇻🇦 450 314 71ms 6 Nov 2023 299th MeWhenI 🇻🇦 447 320 154ms 22 Feb 2023 300th qpwoeirut 446 249 10ms 4 Oct 2025 301st janbehrens 🇩🇪 440 278 495ms 25 Mar 2022 302nd olleicua 🇺🇸 437 180 34ms 1 Oct 2024 303rd DialFrost 🇸🇬 436 186 609ms 23 May 2024 304th prplz 🇦🇺 436 255 18ms 22 Oct 2023 305th MeWhenI 🇻🇦 435 204 302ms 28 Jan 2023 306th Natanaelel 🇸🇪 435 320 162ms 28 Jun 2025 307th MeWhenI 🇻🇦 434 255 11ms 3 Aug 2024 308th snoozingnewt 🇨🇦 434 330 161ms 20 Nov 2025 309th MeWhenI 🇻🇦 433 291 103ms 16 Oct 2022 310th coreynash 432 256 11ms 20 Nov 2023 311th commandblockguy 🇺🇸 432 257 12ms 8 Mar 2025 311th davecame 432 257 12ms 15 Oct 2025 313th MeWhenI 🇻🇦 429 189 465ms 15 Feb 2023 314th CatsAreFluffy 428 354 104ms 4 Feb 2023 315th quirked-up 426 260 10ms 31 Aug 2023 316th MichalMarsalek 🇨🇿 424 262 10ms 5 Nov 2021 316th FortuiteMan 🇫🇷 424 262 18ms 17 days ago 318th MeWhenI 🇻🇦 424 309 458ms 26 Aug 2023 319th MeWhenI 🇻🇦 422 659 28ms 17 Mar 2022 320th neel11235813 419 231 584ms 9 Mar 2024 First Prev 241–320 of 594 Next Last