The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Intersection 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 nwellnhof 🇩🇪 1,000 60 66ms 9 Jan 2022 1st Lydxn 🇨🇦 1,000 60 62ms 28 Feb 2022 1st JayXon 🇺🇸 1,000 60 61ms 17 Jul 2023 1st pardouin 🇫🇷 1,000 60 72ms 26 Jul 2025 5th primo-ppcg 🇹🇭 984 61 37ms 4 May 2022 6th sisyphus-ppcg 🇦🇺 870 69 43ms 12 Oct 2023 7th ovs-code 🇩🇪 857 70 43ms 11 Jul 2024 8th GrayJoKing 🇦🇺 845 71 43ms 5 Aug 2023 9th MeWhenI 🇻🇦 833 72 62ms 16 Aug 2022 9th SirBogman 🇺🇸 833 72 62ms 20 Nov 2022 11th Steffan153 🇫🇮 779 77 40ms 13 Aug 2024 12th anter69 🇭🇺 769 78 59ms 19 Mar 2024 13th Shanethegamer 🇺🇸 759 79 34ms 24 Mar 2023 14th DialFrost 🇸🇬 750 80 37ms 5 Jan 2023 15th KatieLG 🇬🇧 732 82 36ms 2 Oct 2025 16th csharpython 723 83 38ms 16 Oct 2025 17th tatzyr 🇯🇵 706 85 36ms 18 Dec 2024 18th olleicua 🇺🇸 698 86 36ms 25 Mar 2025 19th snoozingnewt 🇨🇦 645 93 37ms 14 Oct 2025 20th stefangimmillaro 594 101 55ms 26 Dec 2024 21st blaztoma 🇱🇹 583 103 39ms 15 Oct 2025 22nd Waffle3z 571 105 35ms 12 Oct 2020 22nd emgordon154 571 105 35ms 20 Nov 2024 24th jared-hughes 566 106 36ms 9 Sep 2022 24th lacrosse 566 106 38ms 26 days ago 26th Natanaelel 🇸🇪 550 109 35ms 27 May 2021 26th orthoplex 🇨🇽 550 109 33ms 30 Mar 2022 26th OhmNomNom 550 109 66ms 1 Nov 2022 26th aaronze 🇦🇺 550 109 37ms 17 Sep 2023 30th hiddicop 🇸🇪 545 110 35ms 28 Jan 2021 30th annaproxy 545 110 36ms 4 Jan 2022 32nd Andriamanitra 🇫🇮 536 112 37ms 20 Jul 2022 33rd adoxography 526 114 36ms 23 Jan 2021 34th schachmattmatt 508 118 33ms 11 Aug 2021 35th boxjelly 480 125 36ms 9 Feb 2021 35th akshatj27 🇦🇶 480 125 36ms 30 Dec 2021 37th KrausRaus 🇺🇸 472 127 35ms 30 Dec 2021 37th Haksell 🇦🇶 472 127 343ms 22 Feb 2023 39th idoschor 469 128 33ms 1 Dec 2020 40th aksyristos 462 130 38ms 8 Sep 2024 41st TheZwierzLF 🇵🇱 385 156 38ms 47 hours ago 42nd KatieLG-Transpiler 🇬🇧 202 297 32ms 3 Jul 2022 1–42 of 42
