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 561st SirBogman 🇺🇸 667 39 43ms 11 Nov 2022 561st T193R-W00D5 667 39 43ms 21 Apr 2025 563rd Shanethegamer 🇺🇸 667 138 100ms 29 Apr 2022 564th eddiesmithxyz 666 117 123ms 15 Jan 2023 565th bzijlema 🇳🇱 666 160 271ms 30 Jan 2024 566th MeWhenI 🇻🇦 665 110 40ms 29 Apr 2025 567th Phil-RGOMEGA 665 121 2ms 31 May 2023 568th Shanethegamer 🇺🇸 663 125 10ms 14 Jun 2024 569th Feniske 🇫🇷 662 72 207ms 10 Nov 2023 570th emgordon154 662 88 122ms 6 Sep 2024 571st primo-ppcg 🇹🇭 662 117 111ms 1 May 2023 572nd MeWhenI 🇻🇦 662 119 97ms 15 Oct 2022 573rd aposteriorist 🇨🇦 662 136 463ms 4 Mar 2022 574th Bonjour27891 🇻🇳 661 83 10ms 15 Jul 2022 574th SB-945 661 83 10ms 17 Apr 2024 574th solisolu 661 83 10ms 6 Nov 2025 577th Grrisly 661 116 1ms 7 Nov 2023 578th kops-cg 661 118 133ms 14 Apr 2021 579th stefangimmillaro 660 109 8ms 17 Oct 2023 579th KrausRaus 🇺🇸 660 109 9ms 13 Dec 2023 579th olleicua 🇺🇸 660 109 9ms 5 Feb 2024 579th junkondo-jp 660 109 9ms 30 Jun 2024 579th targrik 660 109 10ms 8 Jun 2025 579th JOrE20 🇺🇸 660 109 10ms 24 days ago 585th MateuszPietrzak 🇵🇱 660 138 2,475ms 17 Nov 2023 586th Babafaba 659 79 419ms 12 Nov 2025 587th clockworknazo 656 87 2ms 15 Nov 2022 587th dokutan 656 87 384ms 30 Apr 2024 589th bendapootie 656 117 2ms 10 Jul 2020 590th Natanaelel 🇸🇪 654 49 3ms 20 Jul 2023 590th lifthrasiir 🇰🇷 654 49 2ms 28 Nov 2024 590th emgordon154 654 49 2ms 18 Nov 2025 593rd juan-cazalvilla 654 84 10ms 1 Aug 2022 593rd kops-cg 654 84 15ms 26 Feb 2025 595th TomvdPeet 654 96 5ms 24 days ago 596th alexkunin 654 110 9ms 6 Jul 2019 596th Yax42 🇫🇷 654 110 9ms 6 Sep 2025 598th lukechampine 653 163 266ms 19 Apr 2020 598th MeWhenI 🇻🇦 653 163 279ms 10 Feb 2023 600th ovs-code 🇩🇪 652 108 70ms 12 Sep 2024 601st minetoblend 652 133 2,389ms 9 Oct 2025 602nd stefangimmillaro 651 131 368ms 15 Jun 2025 603rd primo-ppcg 🇹🇭 651 151 486ms 25 Sep 2020 604th ovs-code 🇩🇪 650 40 39ms 25 Feb 2025 605th GrayJoKing 🇦🇺 650 70 37ms 28 May 2021 605th plcc0 650 70 40ms 64 mins ago 607th SirBogman 🇺🇸 650 80 394ms 15 Jan 2024 607th Shanethegamer 🇺🇸 650 80 361ms 16 Jan 2024 609th stefangimmillaro 650 143 147ms 29 Oct 2023 610th DaCoolOne 649 124 2ms 21 Nov 2019 610th frosster 649 124 1ms 2 Nov 2025 612th alexsave 648 111 9ms 13 Nov 2025 613th marcin7Cd 646 85 17ms 1 Jan 2021 613th aposteriorist 🇨🇦 646 85 10ms 28 Jan 2022 613th keelimeguy 🇺🇸 646 85 9ms 7 May 2025 616th boxjelly 644 121 120ms 5 Jan 2021 617th Shanethegamer 🇺🇸 644 125 2ms 24 Jan 2024 618th Steffan153 🇫🇮 643 153 431ms 16 Feb 2023 619th Yewzir 🇧🇪 642 112 9ms 20 Apr 2023 619th Mabeloid 🇳🇴 642 112 9ms 26 Oct 2024 621st postie77 642 133 376ms 5 May 2023 622nd Natanaelel 🇸🇪 641 71 39ms 9 Aug 2021 622nd olivermrose 🇺🇸 641 71 41ms 25 Sep 2021 624th angel-p57 🇯🇵 640 196 1ms 23 Nov 2023 625th h3ra993huskp 🇯🇵 639 154 472ms 30 Nov 2025 626th edre 638 86 16ms 7 Jun 2018 627th adamnielson42 🇺🇸 638 99 6ms 20 Nov 2023 628th stefangimmillaro 638 167 266ms 13 Dec 2024 629th iznax 637 113 8ms 2 Jul 2020 629th Salutations45 637 113 9ms 22 Nov 2024 631st rvdnieuwendijk 🇳🇱 635 75 232ms 14 Jul 2020 632nd HumanoidCPU 635 82 415ms 9 May 2025 633rd dokutan 635 111 712ms 17 days ago 634th MobDev-Hobby 634 41 40ms 9 Jan 2024 635th mossr 🇺🇸 634 90 321ms 24 Feb 2021 636th DialFrost 🇸🇬 634 99 5ms 8 Dec 2023 637th ovs-code 🇩🇪 634 102 2ms 7 Feb 2023 638th BrMorrison 634 123 122ms 6 Nov 2023 639th csharpython 632 72 37ms 28 Aug 2025 640th rifatx 632 135 335ms 6 Jul 2024 First Prev 561–640 of 2,411 Next Last