The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
12 Days of Christmas 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 JayXon 🇺🇸 1,000 395 37ms 17 May 2022 2nd primo-ppcg 🇹🇭 985 401 35ms 10 Dec 2021 3rd MeWhenI 🇻🇦 966 409 37ms 3 Aug 2022 4th radarek 🇵🇱 956 413 39ms 18 Jul 2024 4th beirigo 🇧🇷 956 413 37ms 26 Jul 2024 6th pardouin 🇫🇷 952 415 36ms 23 Aug 2025 7th prplz 🇦🇺 943 419 34ms 2 Jul 2021 8th Natanaelel 🇸🇪 936 422 35ms 11 Sep 2021 8th olleicua 🇺🇸 936 422 35ms 26 Feb 2024 10th anter69 🇭🇺 934 423 35ms 20 Nov 2023 11th hiddicop 🇸🇪 932 424 38ms 27 Jan 2021 11th sisyphus-ppcg 🇦🇺 932 424 38ms 4 Feb 2022 11th stefangimmillaro 932 424 39ms 3 Jun 2025 14th GrayJoKing 🇦🇺 925 427 37ms 29 Mar 2021 14th sean-niemann 🇺🇸 925 427 46ms 3 Jan 2024 16th gilufin 923 428 35ms 31 May 2021 17th textninja 921 429 35ms 26 Sep 2020 18th janlelis 916 431 35ms 2 Feb 2021 18th olivermrose 🇺🇸 916 431 33ms 27 Aug 2021 18th ovs-code 🇩🇪 916 431 39ms 16 Mar 2024 21st dwayneparton 914 432 35ms 6 May 2020 21st tatzyr 🇯🇵 914 432 33ms 18 Nov 2024 23rd jared-hughes 910 434 35ms 20 Sep 2022 24th jaredcrystal 🇺🇸 908 435 33ms 15 Dec 2020 25th KatieLG 🇬🇧 906 436 35ms 10 Apr 2022 25th SirBogman 🇺🇸 906 436 35ms 8 Dec 2023 25th neel11235813 906 436 34ms 26 Mar 2024 28th SephQ 898 440 34ms 31 Dec 2020 28th JRaspass 🇬🇧 898 440 37ms 18 Jan 2023 30th SubsTheTechnomancer 894 442 34ms 3 Mar 2023 30th snoozingnewt 🇨🇦 894 442 34ms 23 Sep 2023 32nd gutierrezm00 890 444 35ms 16 Apr 2020 32nd Shanethegamer 🇺🇸 890 444 35ms 28 Jul 2021 34th DialFrost 🇸🇬 888 445 37ms 1 Jun 2024 35th Michaelncallahan 884 447 36ms 17 Apr 2020 35th Haksell 🇦🇶 884 447 33ms 22 Feb 2023 37th blaztoma 🇱🇹 882 448 36ms 13 Oct 2025 38th comp0zr 880 449 37ms 27 Sep 2023 39th biinari 874 452 35ms 27 Mar 2018 40th felixli1998 872 453 37ms 8 Aug 2024 41st 4hg 🇺🇸 870 454 38ms 27 Dec 2022 41st TheZwierzLF 🇵🇱 870 454 34ms 5 hours ago 43rd acornellier 868 455 39ms 1 Dec 2021 44th proton 🇩🇪 866 456 35ms 9 Jun 2020 45th robymus 864 457 35ms 18 Sep 2018 45th jbbarth 🇫🇷 864 457 40ms 23 Aug 2021 45th dokutan 864 457 54ms 21 Apr 2025 48th atsushiootani 862 458 37ms 27 Aug 2018 48th vincecoss 862 458 34ms 15 May 2022 48th paul-c-hartman 862 458 34ms 7 Mar 2025 51st LostSyntax21 🇬🇧 861 459 37ms 5 Jul 2025 52nd Waffle3z 859 460 33ms 21 Jan 2021 52nd aksyristos 859 460 36ms 31 Jan 2023 54th iamsolarpowered 853 463 33ms 16 Dec 2017 54th PikeIt 853 463 35ms 27 Jun 2023 56th DaCuteRaccoon 851 464 37ms 5 May 2022 57th mikiymk 848 466 37ms 21 Sep 2023 58th BrenSchaap 844 468 36ms 11 Nov 2021 59th zloyrusskiy 842 469 34ms 20 Jun 2023 60th HumanoidCPU 840 470 38ms 1 Aug 2024 60th JOrE20 🇺🇸 840 470 45ms 1 Nov 2025 62nd adoxography 833 474 41ms 1 Jun 2018 62nd emgordon154 833 474 50ms 21 Jul 2024 64th ryo-ha-gi 832 475 36ms 22 Jul 2024 64th Lv0Sys 🇵🇱 832 475 34ms 29 May 2025 66th moozzi 830 476 36ms 18 days ago 67th yokasuretsu 828 477 35ms 22 Apr 2018 67th timcustard 828 477 34ms 28 Feb 2022 69th yeco 826 478 34ms 28 Apr 2020 70th madex 🇩🇪 825 479 35ms 19 Dec 2024 71st graft 821 481 36ms 27 Feb 2018 71st dev-Thae 821 481 37ms 6 Nov 2023 73rd hollma 820 482 37ms 20 Oct 2023 74th msbranicky 814 485 35ms 12 Sep 2023 75th bryanmytko 811 487 37ms 7 Sep 2023 76th boxjelly 803 492 35ms 12 Feb 2021 77th YinglunQ 801 493 38ms 18 Jul 2024 78th Kyrremann 796 496 37ms 8 Jan 2020 78th awei82 796 496 36ms 30 Jun 2022 80th gessgallardo 792 499 36ms 21 Jun 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