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 561st lynn 688 48 33ms 9 May 2021 562nd MeWhenI 🇻🇦 688 84 330ms 14 Feb 2023 563rd Shanethegamer 🇺🇸 688 114 104ms 10 Dec 2022 564th tdkkdt 🇷🇺 688 125 404ms 21 Nov 2021 565th yzzyx 688 156 266ms 21 Apr 2020 566th jared-hughes 687 75 35ms 12 Oct 2022 567th DestyNova 🇮🇪 687 96 992ms 13 Aug 2022 568th b-jam 685 96 11ms 7 Dec 2019 568th Attero 🇸🇪 685 96 10ms 5 Oct 2020 568th ragmani 685 96 9ms 18 Dec 2020 571st sean-niemann 🇺🇸 685 134 426ms 4 Jan 2022 571st keelimeguy 🇺🇸 685 134 391ms 4 Nov 2023 573rd MichalMarsalek 🇨🇿 685 184 2ms 2 Apr 2022 574th sean-niemann 🇺🇸 684 113 1ms 5 Jan 2022 574th Heathcorp 🇦🇺 684 113 1ms 25 Oct 2022 574th snoozingnewt 🇨🇦 684 113 1ms 23 Sep 2023 574th madex 🇩🇪 684 113 2ms 9 Jul 2024 574th LostSyntax21 🇬🇧 684 113 2ms 2 Dec 2024 574th LvLError 684 113 2ms 29 May 2025 574th Lv0Sys 🇵🇱 684 113 2ms 30 May 2025 581st cbrt-x 684 115 112ms 4 Oct 2023 582nd verticallity 684 137 154ms 6 Apr 2022 583rd emplv 🇱🇻 683 93 5ms 3 Oct 2023 584th janbehrens 🇩🇪 683 106 9ms 20 Jul 2022 584th DialFrost 🇸🇬 683 106 8ms 5 Oct 2023 586th bendiscz 683 157 268ms 18 Apr 2020 587th steffan-polygolf 682 116 266ms 7 Mar 2024 588th AdrienHache 🇫🇷 682 126 425ms 26 days ago 589th pilaf 🇦🇷 680 97 1,122ms 6 Apr 2022 589th Andriamanitra 🇫🇮 680 97 1,105ms 2 Jan 2024 591st AutumnWind75 680 135 405ms 16 days ago 592nd jacobly0 🇺🇸 680 227 1,725ms 22 Apr 2024 593rd elgan65536 679 138 127ms 22 Oct 2023 594th KatieLG 🇬🇧 678 91 340ms 3 Aug 2025 595th davitf 678 97 9ms 6 Jul 2020 595th mokymok 🇺🇸 678 97 9ms 17 Nov 2021 595th jdw1023 678 97 10ms 26 Apr 2022 595th Bubbler-4 678 97 9ms 2 Nov 2022 595th rollershutter 678 97 9ms 30 Jan 2024 595th Powerroff 678 97 10ms 4 May 2024 595th plcc0 678 97 10ms 5 Mar 2025 595th emgordon154 678 97 9ms 7 Jun 2025 603rd prplz 🇦🇺 678 137 495ms 20 Oct 2020 604th RockOfStone 677 120 2ms 9 Mar 2024 605th janbehrens 🇩🇪 677 127 382ms 17 Apr 2025 605th MeWhenI 🇻🇦 677 127 344ms 19 Jun 2025 607th lukegustafson 🇺🇸 676 107 10ms 24 Jun 2024 608th MeWhenI 🇻🇦 674 110 40ms 29 Apr 2025 609th AlephSquirrel 673 49 42ms 28 Jul 2022 609th Natanaelel 🇸🇪 673 49 3ms 20 Jul 2023 609th lifthrasiir 🇰🇷 673 49 2ms 28 Nov 2024 609th emgordon154 673 49 2ms 18 Nov 2025 613th eddiesmithxyz 673 117 123ms 15 Jan 2023 614th Shanethegamer 🇺🇸 673 138 100ms 29 Apr 2022 615th Phil-RGOMEGA 672 121 2ms 31 May 2023 616th Feniske 🇫🇷 671 72 207ms 10 Nov 2023 617th Yewzir 🇧🇪 671 92 513ms 4 Feb 2024 618th Indivicivet 671 98 9ms 11 Mar 2021 618th IshanPanpaliya 671 98 9ms 6 Oct 2022 618th celiendonze 🇨🇭 671 98 10ms 18 Apr 2023 618th chartung17 671 98 9ms 31 Dec 2023 618th Shanethegamer 🇺🇸 671 98 10ms 24 Jan 2024 618th cardosoo 671 98 9ms 6 Oct 2024 618th Artemis21 🇬🇧 671 98 10ms 21 Dec 2024 618th andrewjc2000 671 98 10ms 2 Jul 2025 618th Nhan-TRANvan_keyloop 671 98 9ms 20 Aug 2025 618th countlpaul-dotcom 671 98 10ms 19 Oct 2025 628th error256 671 113 68ms 28 Jun 2024 629th bzijlema 🇳🇱 671 160 271ms 30 Jan 2024 630th aksyristos 670 77 37ms 31 Jan 2023 630th tatzyr 🇯🇵 670 77 37ms 10 Dec 2024 632nd primo-ppcg 🇹🇭 670 117 111ms 1 May 2023 633rd MeWhenI 🇻🇦 670 119 97ms 15 Oct 2022 634th aposteriorist 🇨🇦 670 136 463ms 4 Mar 2022 635th clockworknazo 667 87 2ms 15 Nov 2022 636th kops-cg 667 118 133ms 14 Apr 2021 637th Grrisly 666 116 1ms 7 Nov 2023 638th dokutan 665 87 384ms 30 Apr 2024 639th MateuszPietrzak 🇵🇱 665 138 2,475ms 17 Nov 2023 640th MeWhenI 🇻🇦 664 93 350ms 17 Jan 2024 First Prev 561–640 of 2,422 Next Last
