The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Diamonds in all languages 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 641st SirBogman 🇺🇸 629 51 32ms 13 Nov 2022 642nd yanjs 629 124 126ms 23 Jan 2022 642nd strout 629 124 121ms 17 Aug 2022 644th bobbogomip 628 61 2ms 7 Nov 2018 645th Meowsan91 🇨🇿 628 136 386ms 21 Nov 2021 646th janbehrens 🇩🇪 628 145 78ms 20 Nov 2022 647th annaproxy 627 83 449ms 21 Jan 2024 648th frobinsonj 626 115 9ms 28 Jun 2018 648th draxler-h 626 115 9ms 13 Jan 2023 648th xyangst 626 115 9ms 28 Sep 2024 648th LukeBridges 🇬🇧 626 115 9ms 1 Oct 2024 652nd AlephSquirrel 626 142 41ms 21 Mar 2025 653rd green-beans 624 88 9ms 30 Jan 2021 653rd zacjl 624 88 16ms 20 Sep 2024 653rd wh3n3v3r 🇨🇿 624 88 9ms 13 Nov 2024 653rd JunkIce 624 88 10ms 19 Jan 2025 653rd Bulmenisaurus 624 88 19ms 7 Jul 2025 658th GrayJoKing 🇦🇺 624 149 151ms 17 Oct 2025 659th FlyingPenguin223 623 73 35ms 7 Nov 2023 659th DialFrost 🇸🇬 623 73 34ms 2 Jun 2024 659th Lv0Sys 🇵🇱 623 73 49ms 17 days ago 662nd dokutan 621 104 64ms 5 days ago 663rd janbehrens 🇩🇪 621 145 477ms 24 Mar 2022 664th didion0 🇺🇸 620 116 8ms 31 Jan 2022 664th fitzdotlol 🇺🇸 620 116 9ms 28 Mar 2022 666th jared-hughes 620 147 408ms 24 Jun 2022 667th annaproxy 619 126 121ms 15 Apr 2022 668th Shanethegamer 🇺🇸 619 159 446ms 25 Sep 2025 669th DialFrost 🇸🇬 618 85 4ms 12 Aug 2024 670th lostMia 617 89 10ms 17 Jun 2023 670th jatloe 617 89 9ms 26 Aug 2024 670th Languag3 617 89 10ms 13 days ago 673rd Shanethegamer 🇺🇸 616 127 124ms 28 Apr 2022 674th pilaf 🇦🇷 615 74 39ms 8 Apr 2022 674th sisyphus-ppcg 🇦🇺 615 74 50ms 18 Oct 2023 674th KatieLG 🇬🇧 615 74 34ms 2 Oct 2025 677th MeWhenI 🇻🇦 615 126 105ms 17 Nov 2022 678th ZakkkkAttackkkk 🇵🇭 614 125 1ms 15 Dec 2021 678th janbehrens 🇩🇪 614 125 2ms 20 Jul 2022 680th Ripick 613 93 363ms 24 Jun 2025 681st AlephSquirrel 612 85 452ms 22 Jan 2024 682nd Herbert00709 🇵🇱 612 149 66ms 10 Mar 2024 683rd ian-h-chamberlain 🇺🇸 612 152 134ms 18 Jul 2022 684th jared-hughes 610 90 10ms 7 Oct 2021 684th LogicalJoe 610 90 9ms 29 Sep 2022 684th AlephSquirrel 610 90 16ms 3 Dec 2022 684th inventshah 610 90 11ms 24 Sep 2023 684th KasperKivimaeki 🇫🇮 610 90 10ms 12 Jul 2025 684th LHuitre 610 90 9ms 1 Sep 2025 690th JDiLenarda 🇫🇷 609 129 1,376ms 2 Nov 2020 691st guliyevemil1 🇦🇿 609 175 265ms 30 Jan 2021 692nd JRaspass 🇬🇧 608 63 2ms 3 Apr 2022 693rd jared-hughes 606 75 45ms 12 Oct 2022 694th orthoplex 🇨🇽 605 53 33ms 7 Oct 2020 695th rgthree 605 119 8ms 5 Sep 2023 696th neihousaigaai 604 127 2ms 5 Apr 2021 697th Yewzir 🇧🇪 604 151 437ms 9 Feb 2024 698th MeWhenI 🇻🇦 603 79 229ms 28 Jan 2023 699th JDHuber23 603 91 9ms 23 Oct 2023 699th Grrisly 603 91 10ms 4 Nov 2023 699th stertooy 🇧🇪 603 91 9ms 13 Jun 2024 699th CaedenHarper 🇨🇦 603 91 9ms 2 Nov 2024 703rd dokutan 602 163 98ms 5 days ago 704th cduerm 602 177 312ms 12 Nov 2020 705th galloj 🇨🇿 601 96 2ms 22 Apr 2024 706th Shanethegamer 🇺🇸 601 150 442ms 12 Dec 2022 707th jacobly0 🇺🇸 600 109 955ms 17 Aug 2023 708th mintypython 600 120 8ms 18 Oct 2018 709th drew-loukusa 599 64 3ms 7 Mar 2020 710th DialFrost 🇸🇬 599 108 3ms 20 Oct 2023 711th gastropner 599 128 2ms 23 Dec 2020 711th Yewzir 🇧🇪 599 128 1ms 9 Feb 2024 713th steffan-polygolf 598 87 457ms 8 Mar 2024 714th StefanHabel 🇨🇦 597 92 9ms 12 Dec 2022 714th betaveros 597 92 10ms 30 Dec 2022 714th markusgraube 597 92 10ms 2 Jul 2023 714th OwPowell 597 92 10ms 18 Dec 2023 714th luuumine 🇫🇷 597 92 11ms 17 Oct 2025 719th Ripick 597 131 364ms 16 Jul 2024 720th KatieLG 🇬🇧 597 143 394ms 30 Jul 2024 First Prev 641–720 of 2,410 Next Last