The Calendar hole will go live in approximately 11 days. Why not try and solve it ahead of time?
brainfuck in Ruby in chars. 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 Chars Time Submitted 1st sisyphus-ppcg 🇦🇺 1,000 63 63ms 12 Jun 2024 2nd janlelis 840 75 45ms 21 Sep 2024 3rd Lydxn 🇨🇦 829 76 40ms 29 Jan 2022 3rd JayXon 🇺🇸 829 76 43ms 12 Jun 2024 5th pardouin 🇫🇷 818 77 50ms 1 Sep 2025 6th Steffan153 🇫🇮 808 78 80ms 29 Feb 2024 7th prplz 🇦🇺 797 79 46ms 7 Jun 2020 8th Shanethegamer 🇺🇸 759 83 49ms 21 Oct 2021 9th DialFrost 🇸🇬 750 84 93ms 30 Jan 2023 9th anter69 🇭🇺 750 84 78ms 19 Mar 2024 11th SirBogman 🇺🇸 741 85 47ms 26 Dec 2023 12th 4hg 🇺🇸 708 89 95ms 11 Dec 2022 13th snoozingnewt 🇨🇦 700 90 60ms 20 Oct 2025 14th GrayJoKing 🇦🇺 692 91 59ms 23 Jul 2024 15th tatzyr 🇯🇵 685 92 50ms 12 Feb 2025 16th plcc0 677 93 49ms 10 Oct 2025 17th KatieLG 🇬🇧 670 94 61ms 2 Oct 2025 18th Natanaelel 🇸🇪 656 96 51ms 14 Oct 2021 19th olleicua 🇺🇸 630 100 39ms 15 Jan 2024 20th nwellnhof 🇩🇪 618 102 51ms 2 Jan 2022 21st UladzimirSukharukau 606 104 52ms 15 Sep 2021 22nd ovs-code 🇩🇪 594 106 44ms 23 Jul 2024 23rd primo-ppcg 🇹🇭 589 107 43ms 1 Nov 2021 24th MeWhenI 🇻🇦 583 108 53ms 30 Dec 2023 24th stefangimmillaro 583 108 58ms 26 Dec 2024 26th olivermrose 🇺🇸 573 110 45ms 14 Sep 2021 27th proton 🇩🇪 534 118 49ms 9 Jun 2020 28th jared-hughes 492 128 48ms 12 Sep 2022 28th jstanley0 492 128 39ms 18 Jan 2024 30th Lv0Sys 🇵🇱 481 131 55ms 20 days ago 31st Andriamanitra 🇫🇮 477 132 45ms 9 Oct 2023 32nd emgordon154 463 136 53ms 14 May 2025 33rd CaedenHarper 🇨🇦 450 140 48ms 7 Sep 2025 34th llwwns 441 143 54ms 1 May 2023 35th ConorOBrien-Foxx 429 147 48ms 10 Apr 2018 35th Waffle3z 429 147 50ms 12 Oct 2020 37th yzhs 🇩🇪 417 151 42ms 20 Jul 2022 38th shraiwi 391 161 48ms 5 Dec 2019 39th hrrs01 384 164 47ms 26 Sep 2018 40th meenie 371 170 48ms 24 Jan 2021 41st biinari 368 171 39ms 13 Aug 2020 42nd yokasuretsu 356 177 48ms 16 Apr 2018 43rd rvs314 354 178 39ms 21 Apr 2022 44th segiddins 333 189 53ms 24 Aug 2018 45th Haksell 🇦🇶 325 194 56ms 22 Feb 2023 46th jaredcrystal 🇺🇸 320 197 52ms 14 Dec 2020 46th aaronze 🇦🇺 320 197 49ms 17 Sep 2023 48th omegahm 301 209 55ms 1 Sep 2023 49th schachmattmatt 247 255 232ms 29 Sep 2021 49th beirigo 🇧🇷 247 255 136ms 6 Nov 2025 51st adoxography 229 275 51ms 22 Jul 2018 52nd graft 216 292 40ms 22 Mar 2018 53rd DaCuteRaccoon 84 751 51ms 30 Dec 2022 1–53 of 53
