The Calendar hole will go live in approximately 3 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 400th Seek64 🇩🇪 742 74 9ms 10 Oct 2024 400th Artemis21 🇬🇧 742 74 10ms 10 Jan 2025 400th plcc0 742 74 10ms 3 Mar 2025 400th davecame 742 74 12ms 23 Oct 2025 405th rambox11 742 97 9ms 8 Dec 2019 405th lukegustafson 🇺🇸 742 97 9ms 27 Jun 2024 407th codereport 🇨🇦 741 77 488ms 17 Apr 2025 408th albanian-laundromat 741 253 568ms 19 Oct 2025 409th MeWhenI 🇻🇦 740 112 6ms 9 May 2024 410th dokutan 738 254 393ms 16 days ago 411th nwellnhof 🇩🇪 737 52 3ms 22 May 2022 412th m-tkach 🇺🇦 737 147 26ms 16 May 2022 413th the-zammers 736 106 122ms 10 Nov 2023 413th YAJUE114514 736 106 116ms 30 Jul 2025 415th billings7 🇬🇧 736 116 365ms 21 Nov 2021 416th snoozingnewt 🇨🇦 736 125 114ms 20 Nov 2025 417th SirBogman 🇺🇸 734 62 38ms 23 May 2022 418th Steffan153 🇫🇮 734 139 27ms 27 Dec 2022 419th KatieLG 🇬🇧 733 71 376ms 6 Oct 2025 420th jwhear 🇺🇸 733 209 1,777ms 1 Oct 2024 421st leon-w 732 75 10ms 12 Jul 2019 421st emgordon154 732 75 9ms 1 Aug 2024 421st 5quiwyrm 732 75 12ms 12 Nov 2024 421st snoozingnewt 🇨🇦 732 75 10ms 28 Sep 2025 425th zacjl 731 105 2ms 10 Nov 2023 426th Natanaelel 🇸🇪 729 44 35ms 28 Nov 2023 427th HolmDev 729 107 114ms 4 Sep 2025 428th hemphen 729 117 383ms 26 Sep 2022 428th Yax42 🇫🇷 729 117 388ms 15 Jun 2025 428th namelessiw 729 117 373ms 19 Jun 2025 431st stefangimmillaro 729 135 464ms 7 Oct 2025 432nd GrayJoKing 🇦🇺 729 140 26ms 6 Jan 2023 433rd MeWhenI 🇻🇦 728 122 40ms 13 Feb 2025 434th BambooleanLogic 🇸🇪 727 99 9ms 5 Dec 2022 434th tayloia 🇬🇧 727 99 9ms 16 May 2023 434th Lv0Sys 🇵🇱 727 99 8ms 27 days ago 437th plcc0 726 90 851ms 46 mins ago 438th emgordon154 726 117 4ms 28 Dec 2024 439th andersk 🇺🇸 725 92 3ms 21 Mar 2020 440th NickTheEASDude 🇺🇸 725 111 2ms 29 Jan 2025 441st jared-hughes 724 106 2ms 3 Nov 2023 441st qwertyuiop3 🇷🇺 724 106 1ms 29 May 2025 443rd kaascevich 724 127 104ms 24 Jul 2025 444th Yewzir 🇧🇪 723 72 351ms 15 Jan 2024 444th albanian-laundromat 723 72 381ms 12 Sep 2025 446th iakolzin 723 126 1,000ms 26 May 2022 447th GolfingSuccess 🇬🇷 722 36 40ms 1 Sep 2022 447th betaveros 722 36 47ms 5 Jan 2023 449th fkantelberg 722 76 11ms 11 Jul 2025 450th btnlq 722 79 2ms 16 Nov 2022 451st rak1507 🇬🇧 722 108 129ms 23 Sep 2021 452nd inventshah 721 80 1ms 8 Sep 2022 453rd elisherer 🇮🇱 719 100 9ms 20 Apr 2019 453rd Naruyoko 719 100 9ms 3 Mar 2023 453rd emgordon154 719 100 10ms 6 Sep 2024 456th JRaspass 🇬🇧 718 51 148ms 3 Apr 2022 457th MeWhenI 🇻🇦 718 109 40ms 26 Aug 2023 457th albanian-laundromat 718 109 40ms 19 Aug 2025 459th Gaddy 🇫🇷 717 119 348ms 12 May 2022 460th Reconcyl 715 109 129ms 5 Jan 2019 460th RussellEmerine 715 109 124ms 27 Feb 2020 462nd emgordon154 715 130 169ms 14 Mar 2025 463rd GrayJoKing 🇦🇺 713 45 3ms 12 Feb 2022 464th RYNO8 713 77 9ms 26 Aug 2021 465th MeWhenI 🇻🇦 713 138 459ms 7 Nov 2025 465th DardS8Br 713 138 421ms 22 days ago 467th clockworknazo 711 91 3ms 27 Feb 2023 468th KatieLG 🇬🇧 711 92 891ms 22 Oct 2021 468th error256 711 92 773ms 31 Oct 2025 470th stefangimmillaro 710 111 99ms 15 Oct 2022 471st CLOStrophobic 🇮🇹 710 124 7ms 23 Apr 2025 472nd user189032 709 110 120ms 29 May 2019 473rd dee-gomma 705 102 9ms 31 Mar 2019 473rd uttumuttu 🇫🇮 705 102 8ms 6 Jan 2022 475th bendapootie 705 121 345ms 21 Nov 2021 475th iznax 705 121 363ms 21 Nov 2021 477th primo-ppcg 🇹🇭 705 151 265ms 17 Apr 2020 478th ryyyn 🇺🇸 704 78 10ms 11 Jul 2025 478th blaztoma 🇱🇹 704 78 10ms 26 Nov 2025 480th Andriamanitra 🇫🇮 704 81 374ms 23 Jul 2023 First Prev 401–480 of 2,411 Next Last