The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Set 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 1st ovs-code 🇩🇪 1,000 33 283ms 17 Nov 2025 2nd pardouin 🇫🇷 948 118 28ms 28 Mar 2025 2nd Seek64 🇩🇪 948 118 29ms 30 Mar 2025 2nd khvdm 948 118 28ms 31 Mar 2025 2nd JayXon 🇺🇸 948 118 29ms 31 Mar 2025 2nd 4atj 948 118 28ms 4 Apr 2025 2nd error256 948 118 28ms 27 Apr 2025 2nd orthoplex 🇨🇽 948 118 29ms 3 Jun 2025 2nd ovs-code 🇩🇪 948 118 31ms 17 Nov 2025 10th GolfingSuccess 🇬🇷 947 44 4,939ms 3 Apr 2025 11th ovs-code 🇩🇪 930 72 58ms 30 Mar 2025 11th Natanaelel 🇸🇪 930 72 53ms 31 Mar 2025 11th xsot 🇸🇬 930 72 69ms 23 Apr 2025 11th radarek 🇵🇱 930 72 79ms 8 Jul 2025 15th lukegustafson 🇺🇸 921 108 77ms 18 Apr 2025 16th ovs-code 🇩🇪 920 51 169ms 17 Nov 2025 17th zacjl 917 36 2,463ms 28 Mar 2025 18th nwellnhof 🇩🇪 917 73 79ms 6 Apr 2025 19th zacjl 917 122 161ms 29 Mar 2025 20th zacjl 916 105 754ms 22 Oct 2025 21st kg583 🇺🇸 909 123 27ms 4 Jan 2025 21st GolfingSuccess 🇬🇷 909 123 28ms 9 Jan 2025 21st AlephSquirrel 909 123 76ms 16 Jan 2025 21st hallvabo 🇳🇴 909 123 25ms 26 Mar 2025 21st emgordon154 909 123 27ms 26 Mar 2025 21st Natanaelel 🇸🇪 909 123 26ms 31 Mar 2025 21st lynn 909 123 26ms 7 Apr 2025 21st Mukundan314 909 123 27ms 12 Apr 2025 21st BlankSpruce 909 123 26ms 13 Apr 2025 21st m-tkach 🇺🇦 909 123 25ms 14 Apr 2025 21st Bulmenisaurus 909 123 28ms 30 Jun 2025 21st SirBogman 🇺🇸 909 123 26ms 1 Jul 2025 21st duckyluuk 🇳🇱 909 123 25ms 6 Jul 2025 21st KatieLG 🇬🇧 909 123 26ms 22 Sep 2025 21st edsrzf 🇳🇿 909 123 26ms 27 Sep 2025 21st Babafaba 909 123 26ms 26 Oct 2025 21st bzijlema 🇳🇱 909 123 27ms 20 days ago 38th nwellnhof 🇩🇪 908 61 391ms 1 Apr 2025 39th saito-ta 🇯🇵 906 46 331ms 28 Mar 2025 40th JayXon 🇺🇸 905 86 1,059ms 24 May 2025 41st GrayJoKing 🇦🇺 904 74 86ms 1 Apr 2025 41st MeWhenI 🇻🇦 904 74 53ms 13 Apr 2025 41st error256 904 74 49ms 8 May 2025 44th btnlq 902 124 26ms 6 Jan 2025 44th inventshah 902 124 33ms 31 Mar 2025 44th albanian-laundromat 902 124 25ms 15 Oct 2025 44th sean-niemann 🇺🇸 902 124 25ms 14 days ago 44th Lv0Sys 🇵🇱 902 124 25ms 8 days ago 49th JayXon 🇺🇸 899 107 657ms 31 Mar 2025 50th davecame 895 125 24ms 12 Apr 2025 51st GrayJoKing 🇦🇺 894 62 427ms 1 Apr 2025 52nd error256 894 87 1,138ms 12 Apr 2025 53rd GolfingSuccess 🇬🇷 892 37 78ms 18 Mar 2025 54th ovs-code 🇩🇪 891 108 4,871ms 29 Mar 2025 55th saito-ta 🇯🇵 888 75 304ms 27 Mar 2025 56th Shanethegamer 🇺🇸 888 126 26ms 13 Feb 2025 56th plcc0 888 126 25ms 26 Mar 2025 56th annaproxy 888 126 27ms 7 Apr 2025 56th BREMAUCY 🇫🇷 888 126 27ms 16 Apr 2025 56th FEZfan 🇦🇺 888 126 26ms 17 Apr 2025 56th ryyyn 🇺🇸 888 126 20ms 24 Apr 2025 56th ndren 888 126 26ms 28 May 2025 56th CornerMercury 🇬🇧 888 126 30ms 28 May 2025 56th 5cw 🇺🇸 888 126 26ms 30 May 2025 56th qpwoeirut 888 126 25ms 4 Sep 2025 56th luuumine 🇫🇷 888 126 26ms 26 Oct 2025 56th snoozingnewt 🇨🇦 888 126 28ms 20 Nov 2025 68th JayXon 🇺🇸 888 135 516ms 8 May 2025 69th JayXon 🇺🇸 881 76 80ms 1 Apr 2025 69th stefangimmillaro 881 76 63ms 8 Apr 2025 71st DialFrost 🇸🇬 881 127 25ms 18 Feb 2025 71st bizy-coder 881 127 35ms 18 Feb 2025 71st bricknellj 881 127 26ms 28 Mar 2025 71st cros107 🇦🇺 881 127 25ms 30 Mar 2025 71st anter69 🇭🇺 881 127 28ms 31 Mar 2025 71st souta-1326 881 127 27ms 1 Apr 2025 71st bknower 881 127 26ms 29 Jun 2025 78th error256 878 183 735ms 24 Sep 2025 79th edsrzf 🇳🇿 876 101 943ms 17 Nov 2025 80th pardouin 🇫🇷 875 110 568ms 18 Feb 2025 1–80 of 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