The Calendar hole will go live in approximately 3 days. Why not try and solve it ahead of time?
Diamonds 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 Lydxn 🇨🇦 1,000 47 37ms 29 Aug 2022 2nd Steffan153 🇫🇮 940 50 37ms 28 Aug 2024 2nd radarek 🇵🇱 940 50 35ms 26 Sep 2025 4th primo-ppcg 🇹🇭 904 52 37ms 22 Aug 2019 4th sean-niemann 🇺🇸 904 52 35ms 12 Oct 2025 6th JayXon 🇺🇸 839 56 36ms 28 Dec 2021 6th nwellnhof 🇩🇪 839 56 35ms 28 Dec 2021 8th pardouin 🇫🇷 825 57 41ms 1 Sep 2025 9th MeWhenI 🇻🇦 797 59 37ms 16 Aug 2022 10th ovs-code 🇩🇪 770 61 35ms 9 May 2023 10th janlelis 770 61 42ms 21 Sep 2024 12th SirBogman 🇺🇸 758 62 38ms 23 May 2022 13th prplz 🇦🇺 723 65 37ms 3 Jan 2020 14th stefangimmillaro 712 66 35ms 6 Jan 2023 14th anter69 🇭🇺 712 66 36ms 25 Jan 2023 14th tatzyr 🇯🇵 712 66 37ms 10 Dec 2024 17th GrayJoKing 🇦🇺 671 70 37ms 28 May 2021 17th plcc0 671 70 40ms 81 mins ago 19th Natanaelel 🇸🇪 662 71 39ms 9 Aug 2021 19th olivermrose 🇺🇸 662 71 41ms 25 Sep 2021 21st csharpython 653 72 37ms 28 Aug 2025 22nd FlyingPenguin223 644 73 39ms 7 Nov 2023 22nd DialFrost 🇸🇬 644 73 35ms 2 Jun 2024 22nd Lv0Sys 🇵🇱 644 73 37ms 27 days ago 25th pilaf 🇦🇷 635 74 36ms 8 Apr 2022 25th sisyphus-ppcg 🇦🇺 635 74 38ms 18 Oct 2023 25th KatieLG 🇬🇧 635 74 34ms 2 Oct 2025 28th jared-hughes 627 75 35ms 12 Oct 2022 29th Shanethegamer 🇺🇸 610 77 39ms 16 Dec 2022 29th aksyristos 610 77 37ms 31 Jan 2023 31st D-MOVE 🇵🇭 603 78 38ms 21 days ago 32nd olleicua 🇺🇸 595 79 36ms 15 Jan 2024 33rd 4hg 🇺🇸 580 81 36ms 29 Sep 2022 33rd inventshah 580 81 39ms 24 Sep 2023 35th Waffle3z 573 82 36ms 17 Oct 2020 35th AgentIvan 🇺🇦 573 82 37ms 28 Jan 2021 37th didroe 547 86 36ms 7 Nov 2024 38th hiddicop 🇸🇪 540 87 42ms 27 Jan 2021 38th Irratix 🇳🇱 540 87 39ms 4 Mar 2022 40th rak1507 🇬🇧 528 89 38ms 23 Sep 2021 41st acornellier 516 91 37ms 9 Dec 2018 41st emgordon154 516 91 38ms 4 Jul 2024 41st lacrosse 516 91 37ms 28 Nov 2025 44th Andriamanitra 🇫🇮 511 92 37ms 20 Jul 2022 45th TFeld00 🇩🇰 505 93 38ms 8 Jun 2019 45th OhmNomNom 505 93 36ms 20 Oct 2022 45th neihousaigaai 505 93 36ms 13 Feb 2024 48th error256 500 94 41ms 18 May 2024 49th aaronze 🇦🇺 490 96 35ms 17 Sep 2023 50th adoxography 475 99 43ms 3 Oct 2019 50th codereport 🇨🇦 475 99 39ms 18 Apr 2025 52nd ConorOBrien-Foxx 461 102 36ms 2 Jul 2018 53rd hrrs01 456 103 49ms 5 Sep 2018 54th n1LS 439 107 36ms 10 Oct 2019 55th snltd 435 108 36ms 16 Aug 2019 55th janbehrens 🇩🇪 435 108 40ms 1 Jun 2022 55th jacobly0 🇺🇸 435 108 47ms 17 Aug 2023 58th proton 🇩🇪 412 114 37ms 11 Jun 2020 59th TheZwierzLF 🇵🇱 409 115 34ms 4 days ago 60th blaztoma 🇱🇹 385 122 37ms 5 Sep 2025 61st dokutan 379 124 37ms 23 Apr 2025 62nd jaredcrystal 🇺🇸 370 127 37ms 14 Dec 2020 63rd sapphyrus 356 132 35ms 2 Aug 2019 63rd Languag3 356 132 36ms 24 Sep 2025 65th 5cw 🇺🇸 341 138 35ms 27 Apr 2023 65th Ralac07 🇦🇺 341 138 40ms 14 Jun 2024 67th segiddins 313 150 35ms 24 Aug 2018 68th nif33 296 159 35ms 30 Jul 2022 69th kmathis22 276 170 40ms 10 Oct 2025 70th Yewzir 🇧🇪 273 172 36ms 6 Feb 2023 70th madex 🇩🇪 273 172 37ms 23 Jul 2024 72nd msbranicky 255 184 40ms 14 Sep 2023 73rd InigoK 🇺🇸 246 191 41ms 25 Apr 2023 74th kenballus 236 199 39ms 4 Dec 2019 74th trist224 🇫🇷 236 199 39ms 28 Nov 2022 74th Betuaredead 236 199 37ms 11 Jan 2023 74th snoozingnewt 🇨🇦 236 199 34ms 7 Sep 2023 74th CyberTapir 236 199 35ms 27 Aug 2024 74th LvLError 236 199 35ms 29 May 2025 80th albanian-laundromat 212 222 41ms 11 Apr 2025 1–80 of 119 Next Last