The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
Christmas Trees 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 primo-ppcg 🇹🇭 1,000 47 44ms 20 Aug 2019 1st Lydxn 🇨🇦 1,000 47 42ms 29 Aug 2022 3rd sisyphus-ppcg 🇦🇺 979 48 48ms 24 Mar 2022 4th nwellnhof 🇩🇪 887 53 36ms 28 Dec 2021 4th radarek 🇵🇱 887 53 37ms 11 Dec 2024 4th pardouin 🇫🇷 887 53 42ms 1 Sep 2025 7th MeWhenI 🇻🇦 870 54 71ms 1 Jul 2022 7th Steffan153 🇫🇮 870 54 71ms 29 Aug 2024 7th janlelis 870 54 38ms 21 Sep 2024 7th sean-niemann 🇺🇸 870 54 56ms 7 Aug 2025 11th JayXon 🇺🇸 855 55 41ms 2 Oct 2021 12th olivermrose 🇺🇸 839 56 36ms 7 Oct 2021 12th SirBogman 🇺🇸 839 56 51ms 15 Jan 2025 14th han-yan 825 57 34ms 12 Dec 2020 14th jaredcrystal 🇺🇸 825 57 35ms 14 Dec 2020 14th simonista 825 57 39ms 15 Dec 2020 14th roor0 825 57 39ms 18 Dec 2020 14th GrayJoKing 🇦🇺 825 57 34ms 18 Dec 2020 14th OhmNomNom 825 57 38ms 20 Oct 2022 14th Natanaelel 🇸🇪 825 57 42ms 22 Nov 2023 14th ovs-code 🇩🇪 825 57 54ms 8 Jul 2024 22nd maths22 🇺🇸 810 58 41ms 10 Dec 2020 22nd jstanley0 810 58 35ms 12 Dec 2020 22nd jbbarth 🇫🇷 810 58 36ms 9 Aug 2021 25th prplz 🇦🇺 797 59 43ms 8 Dec 2019 25th lynn 797 59 38ms 25 May 2022 25th anter69 🇭🇺 797 59 35ms 25 Jan 2023 25th stefangimmillaro 797 59 36ms 3 Feb 2023 25th D-MOVE 🇵🇭 797 59 48ms 15 days ago 25th blaztoma 🇱🇹 797 59 34ms 45 hours ago 31st TFeld00 🇩🇰 783 60 41ms 7 Jun 2019 31st Irratix 🇳🇱 783 60 47ms 27 Jun 2022 31st jared-hughes 783 60 43ms 12 Sep 2022 31st Shanethegamer 🇺🇸 783 60 37ms 26 Mar 2024 31st dokutan 783 60 50ms 1 May 2024 36th hiddicop 🇸🇪 770 61 36ms 22 Jan 2021 36th DialFrost 🇸🇬 770 61 42ms 11 Feb 2023 38th n1LS 758 62 39ms 2 Oct 2019 38th RowdyLemon 758 62 35ms 14 Dec 2020 38th liemvo 🇻🇳 758 62 35ms 7 May 2021 38th KatieLG 🇬🇧 758 62 50ms 2 Oct 2025 38th Lv0Sys 🇵🇱 758 62 50ms 22 days ago 43rd brianlwatson 746 63 42ms 9 Dec 2020 43rd Waffle3z 746 63 41ms 21 Jan 2021 43rd NewDefectus 🇮🇱 746 63 36ms 10 Feb 2021 43rd emgordon154 746 63 52ms 17 Nov 2024 43rd olleicua 🇺🇸 746 63 40ms 13 Jun 2025 48th biinari 734 64 40ms 25 Mar 2018 48th Ardena 734 64 36ms 11 Dec 2020 48th 4hg 🇺🇸 734 64 33ms 8 Nov 2022 51st michaelbaudino 723 65 43ms 18 Oct 2020 51st badboj40 723 65 38ms 14 Feb 2023 51st kroolp 🇵🇱 723 65 38ms 14 Jul 2024 54th TheZwierzLF 🇵🇱 712 66 36ms 12 hours ago 55th takebackfr 701 67 45ms 7 Dec 2021 55th Andriamanitra 🇫🇮 701 67 35ms 21 Jul 2022 55th Haksell 🇦🇶 701 67 35ms 22 Feb 2023 55th tatzyr 🇯🇵 701 67 38ms 30 Nov 2024 59th acornellier 691 68 35ms 9 Dec 2018 59th tarotaro0 691 68 43ms 2 Oct 2019 59th aydamak 691 68 39ms 15 May 2024 62nd robymus 681 69 45ms 18 Sep 2018 62nd shraiwi 681 69 37ms 30 Sep 2019 62nd FlyingPenguin223 681 69 50ms 2 Nov 2023 65th yzhs 🇩🇪 671 70 39ms 6 Sep 2020 65th james-logan 671 70 35ms 9 Dec 2020 67th dwayneparton 662 71 35ms 13 May 2020 67th aksyristos 662 71 35ms 3 Feb 2023 69th yokasuretsu 644 73 43ms 16 Apr 2018 70th LostSyntax21 🇬🇧 635 74 33ms 10 Sep 2024 71st 0xddom 627 75 33ms 18 Dec 2019 72nd snltd 618 76 44ms 14 Oct 2019 72nd eggplants 🇯🇵 618 76 43ms 26 Nov 2020 74th proton 🇩🇪 610 77 37ms 9 Jun 2020 74th bstrautin 610 77 35ms 12 Jun 2020 74th annaproxy 610 77 39ms 22 Oct 2023 77th segiddins 595 79 47ms 24 Aug 2018 77th snoozingnewt 🇨🇦 595 79 39ms 4 Nov 2023 79th hrrs01 588 80 39ms 25 Jan 2018 80th adoxography 580 81 35ms 1 Jun 2018 1–80 of 99 Next Last