The Calendar hole will go live in approximately 5 days. Why not try and solve it ahead of time?
Diamonds in all languages 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 716th wobblybits 638 103 9ms 15 Aug 2025 722nd 4hg 🇺🇸 637 81 36ms 29 Sep 2022 722nd inventshah 637 81 39ms 24 Sep 2023 724th rifatx 637 135 335ms 6 Jul 2024 725th MichalMarsalek 🇨🇿 636 97 388ms 21 Jan 2024 726th yanjs 635 124 126ms 23 Jan 2022 726th strout 635 124 121ms 17 Aug 2022 728th AlephSquirrel 634 142 41ms 21 Mar 2025 729th janbehrens 🇩🇪 633 145 62ms 20 Nov 2022 730th hoodadam 632 104 10ms 14 Jun 2019 730th stordev 632 104 9ms 26 Feb 2021 730th ahmetdemirag 🇨🇾 632 104 9ms 21 Jun 2024 730th comp0zr 632 104 10ms 10 Oct 2024 734th Meowsan91 🇨🇿 632 136 386ms 21 Nov 2021 735th iczelia 🇩🇪 631 76 2ms 16 Oct 2025 736th DialFrost 🇸🇬 630 85 4ms 12 Aug 2024 737th Waffle3z 629 82 36ms 17 Oct 2020 737th AgentIvan 🇺🇦 629 82 37ms 28 Jan 2021 739th frobinsonj 629 115 8ms 28 Jun 2018 739th draxler-h 629 115 9ms 13 Jan 2023 739th LukeBridges 🇬🇧 629 115 9ms 1 Oct 2024 742nd GrayJoKing 🇦🇺 629 149 151ms 17 Oct 2025 743rd janbehrens 🇩🇪 628 145 477ms 24 Mar 2022 744th kevinmchung 626 105 9ms 18 Sep 2018 744th sambirnbaum1 626 105 9ms 15 Sep 2019 744th feherd 626 105 10ms 29 Aug 2021 744th redbeancola 626 105 9ms 5 Nov 2021 744th mousetail 🇳🇱 626 105 9ms 2 Nov 2022 744th M0PKOBKA 626 105 10ms 21 Dec 2022 744th janbehrens 🇩🇪 626 105 9ms 17 Jun 2023 744th AlexanderFair 626 105 10ms 26 Jun 2023 744th fgrosshans 🇫🇷 626 105 9ms 17 Jul 2024 744th edsrzf 🇳🇿 626 105 9ms 22 Nov 2024 744th Babafaba 626 105 9ms 23 Nov 2025 744th CommandLeo 🇮🇹 626 105 12ms 2 mins ago 756th annaproxy 625 126 121ms 15 Apr 2022 757th commandblockguy 🇺🇸 624 99 663ms 15 Jan 2024 758th didion0 🇺🇸 624 116 8ms 31 Jan 2022 758th fitzdotlol 🇺🇸 624 116 8ms 28 Mar 2022 760th jared-hughes 624 147 408ms 24 Jun 2022 761st orthoplex 🇨🇽 623 53 33ms 7 Oct 2020 762nd elisherer 🇮🇱 623 77 2ms 20 Apr 2019 762nd nephila-nacrea 🇬🇧 623 77 2ms 10 Dec 2020 764th Shanethegamer 🇺🇸 623 127 124ms 28 Apr 2022 765th Shanethegamer 🇺🇸 623 159 446ms 25 Sep 2025 766th Ripick 622 93 339ms 24 Jun 2025 767th MeWhenI 🇻🇦 622 126 105ms 17 Nov 2022 768th Shanethegamer 🇺🇸 621 83 36ms 24 Jan 2024 769th decorator-factory 620 106 12ms 24 May 2019 769th mosho-p 620 106 10ms 11 Oct 2022 769th Europe2048 620 106 9ms 21 Nov 2024 769th dirckvdende 620 106 10ms 9 Jul 2025 769th qpwoeirut 620 106 10ms 19 Nov 2025 774th ZakkkkAttackkkk 🇵🇭 618 125 1ms 15 Dec 2021 774th janbehrens 🇩🇪 618 125 2ms 20 Jul 2022 776th JDiLenarda 🇫🇷 618 129 1,376ms 2 Nov 2020 777th snoozingnewt 🇨🇦 617 100 823ms 11 Feb 2024 778th albanian-laundromat 617 123 70ms 17 days ago 779th Herbert00709 🇵🇱 616 149 62ms 10 Mar 2024 780th ian-h-chamberlain 🇺🇸 616 152 134ms 18 Jul 2022 781st mossr 🇺🇸 615 94 321ms 24 Feb 2021 782nd garrisonhh 614 107 9ms 25 Nov 2020 782nd Fracture17 614 107 9ms 4 Apr 2023 782nd quimey 614 107 9ms 21 Jun 2023 785th SirFireball3521 613 74 142ms 21 Mar 2023 786th guliyevemil1 🇦🇿 613 175 265ms 30 Jan 2021 787th MeWhenI 🇻🇦 612 79 229ms 28 Jan 2023 788th galloj 🇨🇿 612 96 2ms 22 Apr 2024 789th dzhang314 609 108 10ms 13 Aug 2019 789th cubed-guy 609 108 9ms 3 Apr 2022 789th jakobkordez 🇸🇮 609 108 10ms 31 Oct 2022 789th b10011 🇫🇮 609 108 10ms 7 Jan 2023 789th cykim8811 609 108 9ms 9 Jul 2024 789th cros107 🇦🇺 609 108 9ms 21 days ago 795th dokutan 609 163 98ms 13 days ago 796th rgthree 608 119 8ms 5 Sep 2023 797th neihousaigaai 608 127 2ms 5 Apr 2021 798th Yewzir 🇧🇪 608 151 423ms 9 Feb 2024 799th MeWhenI 🇻🇦 608 152 6ms 12 Apr 2024 800th Shanethegamer 🇺🇸 607 125 73ms 16 Feb 2025 First Prev 721–800 of 2,422 Next Last
