The Calendar hole will go live in approximately 6 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 81st Bubbler-4 848 89 35ms 24 Feb 2022 81st SirBogman 🇺🇸 848 89 34ms 18 Apr 2022 83rd SirBogman 🇺🇸 848 248 47ms 3 Jun 2025 84th rucin93 🇵🇱 847 211 6ms 19 Nov 2025 85th Seek64 🇩🇪 842 132 17ms 5 Jun 2025 86th SirBogman 🇺🇸 840 248 19ms 6 Oct 2025 87th blaztoma 🇱🇹 838 333 47ms 11 hours ago 88th pardouin 🇫🇷 837 94 37ms 2 Aug 2025 89th edsrzf 🇳🇿 837 177 101ms 2 days ago 90th albanian-laundromat 837 345 73ms 13 Nov 2025 91st SirBogman 🇺🇸 835 230 33ms 8 Feb 2023 92nd edsrzf 🇳🇿 835 287 43ms 24 Nov 2025 93rd SirBogman 🇺🇸 834 116 928ms 17 Jan 2024 94th JayXon 🇺🇸 834 291 1,832ms 6 Mar 2025 95th Bubbler-4 833 60 3ms 25 Feb 2022 95th primo-ppcg 🇹🇭 833 60 49ms 28 Nov 2022 97th pardouin 🇫🇷 833 98 994ms 31 Jul 2025 98th rucin93 🇵🇱 830 134 137ms 13 May 2025 99th emgordon154 829 350 510ms 26 Oct 2025 100th NewDefectus 🇮🇱 828 158 52ms 27 Nov 2021 101st CLOStrophobic 🇮🇹 826 231 12ms 6 Mar 2025 102nd SirBogman 🇺🇸 825 99 1,033ms 30 Jan 2023 103rd sean-niemann 🇺🇸 824 135 140ms 17 Jun 2025 104th AlephSquirrel 823 135 11ms 31 Jan 2024 105th emplv 🇱🇻 823 153 100ms 7 Dec 2022 106th primo-ppcg 🇹🇭 822 351 56ms 22 May 2023 107th lynn 820 118 841ms 17 Feb 2024 108th UnderKoen 🇳🇱 820 339 14ms 20 Jan 2025 109th primo-ppcg 🇹🇭 819 96 43ms 26 Jan 2025 110th ovs-code 🇩🇪 819 185 66ms 21 Mar 2024 111th typeswitch-dev 🇵🇹 818 362 10ms 14 Aug 2023 112th 5cw 🇺🇸 817 136 11ms 29 Apr 2024 113th primo-ppcg 🇹🇭 814 416 13ms 3 Aug 2023 114th albanian-laundromat 813 343 46ms 7 Sep 2025 115th hallvabo 🇳🇴 811 137 11ms 22 Mar 2022 116th canissimia 🇦🇶 804 368 51ms 5 Dec 2021 117th MeWhenI 🇻🇦 801 409 24ms 3 Jan 2025 118th ovs-code 🇩🇪 793 103 1,066ms 21 Mar 2024 119th lynn 792 217 219ms 9 Nov 2025 120th SirBogman 🇺🇸 790 155 503ms 13 Mar 2022 121st KatieLG 🇬🇧 790 7,556 18ms 12 Oct 2025 122nd primo-ppcg 🇹🇭 782 244 40ms 29 Jan 2023 123rd nwellnhof 🇩🇪 779 142 10ms 8 Nov 2021 123rd SirBogman 🇺🇸 779 142 10ms 14 Nov 2022 125th blaztoma 🇱🇹 778 371 27ms 4 days ago 126th ovs-code 🇩🇪 776 156 2ms 21 Mar 2024 127th jared-hughes 773 202 6ms 11 Apr 2022 128th emgordon154 771 126 39ms 27 Oct 2025 129th bitsandbeyond 🇳🇱 768 144 10ms 11 Nov 2025 130th MeWhenI 🇻🇦 765 809 34ms 4 Nov 2021 131st GrayJoKing 🇦🇺 763 110 224ms 23 Jan 2023 132nd AlephSquirrel 762 127 512ms 21 Jan 2024 133rd albanian-laundromat 761 381 481ms 24 Oct 2025 134th kg583 🇺🇸 758 316 212ms 23 Nov 2025 135th blaztoma 🇱🇹 756 196 103ms 2 days ago 136th MeWhenI 🇻🇦 755 7,903 126ms 7 Dec 2023 137th blaztoma 🇱🇹 751 148 12ms 11 hours ago 138th primo-ppcg 🇹🇭 749 109 1,048ms 19 Nov 2021 139th stefangimmillaro 748 250 265ms 5 May 2025 140th albanian-laundromat 746 131 793ms 13 Nov 2025 141st nwellnhof 🇩🇪 746 149 12ms 4 Nov 2021 142nd lynn 743 144 368ms 9 Feb 2022 143rd tomtheisen 🇺🇸 738 145 421ms 6 Feb 2025 144th bricknellj 736 151 24ms 23 May 2024 145th kg583 🇺🇸 736 259 27ms 9 May 2025 146th btnlq 731 152 11ms 4 Nov 2021 147th NewDefectus 🇮🇱 728 152 11ms 18 Nov 2021 148th nwellnhof 🇩🇪 728 208 65ms 23 May 2022 149th KasperKivimaeki 🇫🇮 725 167 2ms 24 Jan 2025 150th bitsandbeyond 🇳🇱 725 258 249ms 11 Nov 2025 151st acotis 722 238 227ms 23 Jun 2025 152nd primo-ppcg 🇹🇭 721 154 11ms 20 Nov 2021 153rd ryyyn 🇺🇸 717 155 30ms 28 Oct 2025 154th stefangimmillaro 715 110 39ms 26 Dec 2024 155th nwellnhof 🇩🇪 714 262 275ms 4 Nov 2021 156th Yax42 🇫🇷 713 150 425ms 20 Aug 2025 157th emplv 🇱🇻 705 265 291ms 19 Apr 2023 158th andersk 🇺🇸 698 246 229ms 5 Nov 2022 159th nwellnhof 🇩🇪 696 113 39ms 3 Nov 2021 160th stefangimmillaro 691 208 458ms 6 Oct 2025 First Prev 81–160 of 595 Next Last