The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Christmas Trees 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 radarek 🇵🇱 1,000 56 33ms 4 May 2023 1st Lydxn 🇨🇦 1,000 56 34ms 4 May 2023 1st pardouin 🇫🇷 1,000 56 43ms 1 Sep 2025 4th janlelis 982 57 33ms 5 Jan 2020 4th primo-ppcg 🇹🇭 982 57 35ms 3 Dec 2020 4th han-yan 982 57 34ms 12 Dec 2020 4th jaredcrystal 🇺🇸 982 57 35ms 14 Dec 2020 4th simonista 982 57 38ms 15 Dec 2020 4th roor0 982 57 37ms 18 Dec 2020 4th GrayJoKing 🇦🇺 982 57 34ms 18 Dec 2020 4th nwellnhof 🇩🇪 982 57 36ms 1 Oct 2021 4th sisyphus-ppcg 🇦🇺 982 57 36ms 4 Feb 2022 4th MeWhenI 🇻🇦 982 57 38ms 1 Jul 2022 4th OhmNomNom 982 57 36ms 20 Oct 2022 4th Steffan153 🇫🇮 982 57 33ms 20 Feb 2023 4th JayXon 🇺🇸 982 57 35ms 24 Apr 2023 4th Natanaelel 🇸🇪 982 57 36ms 22 Nov 2023 4th ovs-code 🇩🇪 982 57 34ms 8 Jul 2024 4th sean-niemann 🇺🇸 982 57 35ms 7 Aug 2025 20th maths22 🇺🇸 966 58 34ms 10 Dec 2020 20th jstanley0 966 58 35ms 12 Dec 2020 20th jbbarth 🇫🇷 966 58 36ms 9 Aug 2021 20th SirBogman 🇺🇸 966 58 34ms 15 Jan 2025 24th prplz 🇦🇺 949 59 35ms 28 Oct 2020 24th lynn 949 59 36ms 25 May 2022 24th stefangimmillaro 949 59 35ms 3 Feb 2023 24th D-MOVE 🇵🇭 949 59 35ms 18 days ago 24th blaztoma 🇱🇹 949 59 34ms 4 days ago 29th TFeld00 🇩🇰 933 60 34ms 7 Jun 2019 29th Irratix 🇳🇱 933 60 35ms 27 Jun 2022 29th jared-hughes 933 60 37ms 12 Sep 2022 29th Shanethegamer 🇺🇸 933 60 34ms 26 Mar 2024 33rd hiddicop 🇸🇪 918 61 35ms 22 Jan 2021 33rd olivermrose 🇺🇸 918 61 35ms 7 Oct 2021 33rd DialFrost 🇸🇬 918 61 37ms 2 Jun 2024 36th n1LS 903 62 33ms 2 Oct 2019 36th RowdyLemon 903 62 35ms 14 Dec 2020 36th liemvo 🇻🇳 903 62 35ms 7 May 2021 36th Lv0Sys 🇵🇱 903 62 35ms 25 days ago 40th brianlwatson 889 63 35ms 9 Dec 2020 40th Waffle3z 889 63 33ms 21 Jan 2021 40th NewDefectus 🇮🇱 889 63 35ms 10 Feb 2021 40th emgordon154 889 63 35ms 17 Nov 2024 40th olleicua 🇺🇸 889 63 35ms 13 Jun 2025 45th biinari 875 64 37ms 25 Mar 2018 45th Ardena 875 64 36ms 11 Dec 2020 45th 4hg 🇺🇸 875 64 33ms 8 Nov 2022 48th michaelbaudino 862 65 35ms 18 Oct 2020 48th anter69 🇭🇺 862 65 39ms 3 Aug 2021 48th badboj40 862 65 38ms 14 Feb 2023 48th dokutan 862 65 34ms 30 Apr 2024 48th kroolp 🇵🇱 862 65 32ms 14 Jul 2024 53rd TheZwierzLF 🇵🇱 848 66 33ms 3 days ago 54th takebackfr 836 67 33ms 7 Dec 2021 54th Andriamanitra 🇫🇮 836 67 35ms 21 Jul 2022 54th Haksell 🇦🇶 836 67 34ms 22 Feb 2023 57th acornellier 824 68 35ms 9 Dec 2018 57th tarotaro0 824 68 32ms 2 Oct 2019 57th aydamak 824 68 37ms 15 May 2024 60th robymus 812 69 37ms 18 Sep 2018 60th shraiwi 812 69 35ms 30 Sep 2019 60th KatieLG 🇬🇧 812 69 30ms 10 Apr 2022 60th FlyingPenguin223 812 69 38ms 2 Nov 2023 64th yzhs 🇩🇪 800 70 35ms 6 Sep 2020 64th james-logan 800 70 35ms 9 Dec 2020 66th dwayneparton 789 71 34ms 13 May 2020 66th aksyristos 789 71 35ms 3 Feb 2023 68th yokasuretsu 767 73 33ms 16 Apr 2018 69th LostSyntax21 🇬🇧 757 74 32ms 10 Sep 2024 70th 0xddom 747 75 33ms 18 Dec 2019 71st snltd 737 76 36ms 14 Oct 2019 71st eggplants 🇯🇵 737 76 35ms 26 Nov 2020 73rd proton 🇩🇪 727 77 35ms 9 Jun 2020 73rd bstrautin 727 77 34ms 12 Jun 2020 73rd annaproxy 727 77 37ms 22 Oct 2023 76th segiddins 709 79 35ms 24 Aug 2018 76th snoozingnewt 🇨🇦 709 79 33ms 4 Nov 2023 76th tatzyr 🇯🇵 709 79 34ms 30 Nov 2024 79th hrrs01 700 80 35ms 25 Jan 2018 80th adoxography 691 81 35ms 1 Jun 2018 1–80 of 99 Next Last