The Calendar hole will go live in approximately 4 days. Why not try and solve it ahead of time?
brainfuck in Ruby 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 GrayJoKing 🇦🇺 1,000 91 49ms 23 Jul 2024 2nd sisyphus-ppcg 🇦🇺 948 96 41ms 12 Jun 2024 3rd janlelis 919 99 54ms 28 Apr 2022 4th Lydxn 🇨🇦 910 100 44ms 8 Mar 2022 5th JayXon 🇺🇸 901 101 47ms 12 Jun 2024 6th nwellnhof 🇩🇪 892 102 45ms 2 Jan 2022 6th pardouin 🇫🇷 892 102 49ms 1 Sep 2025 8th UladzimirSukharukau 875 104 42ms 15 Sep 2021 8th Steffan153 🇫🇮 875 104 44ms 1 Jun 2024 10th Natanaelel 🇸🇪 867 105 43ms 18 Feb 2025 11th ovs-code 🇩🇪 858 106 51ms 23 Jul 2024 12th prplz 🇦🇺 850 107 39ms 6 Jun 2021 12th primo-ppcg 🇹🇭 850 107 48ms 1 Nov 2021 14th MeWhenI 🇻🇦 843 108 45ms 30 Dec 2023 14th DialFrost 🇸🇬 843 108 42ms 26 Dec 2024 14th stefangimmillaro 843 108 39ms 26 Dec 2024 17th Shanethegamer 🇺🇸 813 112 43ms 25 Dec 2023 18th SirBogman 🇺🇸 784 116 48ms 26 Dec 2023 19th proton 🇩🇪 771 118 39ms 9 Jun 2020 19th anter69 🇭🇺 771 118 56ms 19 Mar 2024 21st snoozingnewt 🇨🇦 722 126 42ms 20 Oct 2025 22nd jared-hughes 711 128 40ms 12 Sep 2022 22nd 4hg 🇺🇸 711 128 41ms 11 Dec 2022 22nd jstanley0 711 128 39ms 18 Jan 2024 25th tatzyr 🇯🇵 700 130 42ms 12 Feb 2025 26th plcc0 695 131 41ms 10 Oct 2025 26th Lv0Sys 🇵🇱 695 131 43ms 26 days ago 28th Andriamanitra 🇫🇮 689 132 38ms 9 Oct 2023 29th olivermrose 🇺🇸 684 133 42ms 10 Oct 2021 29th olleicua 🇺🇸 684 133 41ms 20 Jan 2024 31st KatieLG 🇬🇧 679 134 40ms 26 Dec 2023 32nd emgordon154 669 136 51ms 14 May 2025 33rd CaedenHarper 🇨🇦 650 140 46ms 7 Sep 2025 34th llwwns 636 143 39ms 1 May 2023 35th ConorOBrien-Foxx 619 147 45ms 10 Apr 2018 35th Waffle3z 619 147 53ms 12 Oct 2020 37th TheZwierzLF 🇵🇱 611 149 38ms 38 hours ago 38th yzhs 🇩🇪 603 151 54ms 20 Jul 2022 39th shraiwi 565 161 38ms 5 Dec 2019 40th hrrs01 555 164 40ms 26 Sep 2018 41st meenie 535 170 38ms 24 Jan 2021 42nd biinari 532 171 40ms 13 Aug 2020 43rd yokasuretsu 514 177 44ms 16 Apr 2018 44th rvs314 511 178 42ms 21 Apr 2022 45th segiddins 481 189 38ms 24 Aug 2018 46th Haksell 🇦🇶 469 194 42ms 22 Feb 2023 47th jaredcrystal 🇺🇸 462 197 43ms 14 Dec 2020 47th aaronze 🇦🇺 462 197 48ms 17 Sep 2023 49th omegahm 435 209 54ms 1 Sep 2023 50th schachmattmatt 357 255 145ms 29 Sep 2021 50th beirigo 🇧🇷 357 255 139ms 6 Nov 2025 52nd adoxography 331 275 45ms 22 Jul 2018 53rd graft 312 292 42ms 22 Mar 2018 54th DaCuteRaccoon 121 751 40ms 30 Dec 2022 1–54 of 54
