The Calendar hole will go live in approximately 9 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 MeWhenI 🇻🇦 688 84 378ms 14 Feb 2023 562nd Shanethegamer 🇺🇸 688 114 104ms 10 Dec 2022 563rd tdkkdt 🇷🇺 688 125 404ms 21 Nov 2021 564th yzzyx 688 156 266ms 21 Apr 2020 565th jared-hughes 687 75 45ms 12 Oct 2022 566th DestyNova 🇮🇪 687 96 992ms 13 Aug 2022 567th b-jam 685 96 11ms 7 Dec 2019 567th Attero 🇸🇪 685 96 10ms 5 Oct 2020 567th ragmani 685 96 9ms 18 Dec 2020 570th sean-niemann 🇺🇸 685 134 512ms 4 Jan 2022 570th keelimeguy 🇺🇸 685 134 391ms 4 Nov 2023 572nd MichalMarsalek 🇨🇿 685 184 2ms 2 Apr 2022 573rd sean-niemann 🇺🇸 684 113 1ms 5 Jan 2022 573rd Heathcorp 🇦🇺 684 113 1ms 25 Oct 2022 573rd snoozingnewt 🇨🇦 684 113 1ms 23 Sep 2023 573rd madex 🇩🇪 684 113 2ms 9 Jul 2024 573rd LostSyntax21 🇬🇧 684 113 2ms 2 Dec 2024 573rd LvLError 684 113 2ms 29 May 2025 573rd Lv0Sys 🇵🇱 684 113 2ms 30 May 2025 580th cbrt-x 684 115 112ms 4 Oct 2023 581st verticallity 684 137 154ms 6 Apr 2022 582nd emplv 🇱🇻 683 93 4ms 3 Oct 2023 583rd janbehrens 🇩🇪 683 106 9ms 20 Jul 2022 583rd DialFrost 🇸🇬 683 106 8ms 5 Oct 2023 585th bendiscz 683 157 268ms 18 Apr 2020 586th steffan-polygolf 682 116 266ms 7 Mar 2024 587th AdrienHache 🇫🇷 682 126 425ms 21 days ago 588th pilaf 🇦🇷 680 97 1,122ms 6 Apr 2022 588th Andriamanitra 🇫🇮 680 97 1,105ms 2 Jan 2024 590th AutumnWind75 680 135 429ms 11 days ago 591st jacobly0 🇺🇸 680 227 1,725ms 22 Apr 2024 592nd elgan65536 679 138 127ms 22 Oct 2023 593rd KatieLG 🇬🇧 678 91 340ms 3 Aug 2025 594th davitf 678 97 9ms 6 Jul 2020 594th mokymok 🇺🇸 678 97 9ms 17 Nov 2021 594th jdw1023 678 97 10ms 26 Apr 2022 594th Bubbler-4 678 97 9ms 2 Nov 2022 594th rollershutter 678 97 9ms 30 Jan 2024 594th Powerroff 678 97 10ms 4 May 2024 594th plcc0 678 97 10ms 5 Mar 2025 594th emgordon154 678 97 9ms 7 Jun 2025 602nd RockOfStone 678 120 1ms 9 Mar 2024 603rd prplz 🇦🇺 678 137 495ms 20 Oct 2020 604th janbehrens 🇩🇪 677 127 382ms 17 Apr 2025 604th MeWhenI 🇻🇦 677 127 344ms 19 Jun 2025 606th lukegustafson 🇺🇸 676 107 10ms 24 Jun 2024 607th MeWhenI 🇻🇦 674 110 40ms 29 Apr 2025 608th AlephSquirrel 673 49 37ms 28 Jul 2022 608th Natanaelel 🇸🇪 673 49 3ms 20 Jul 2023 608th lifthrasiir 🇰🇷 673 49 2ms 28 Nov 2024 608th emgordon154 673 49 2ms 18 Nov 2025 612th cake287 673 117 123ms 15 Jan 2023 613th Phil-RGOMEGA 673 121 1ms 31 May 2023 614th Shanethegamer 🇺🇸 673 138 100ms 29 Apr 2022 615th Feniske 🇫🇷 671 72 229ms 10 Nov 2023 616th Yewzir 🇧🇪 671 92 513ms 4 Feb 2024 617th Indivicivet 671 98 9ms 11 Mar 2021 617th IshanPanpaliya 671 98 9ms 6 Oct 2022 617th celiendonze 🇨🇭 671 98 10ms 18 Apr 2023 617th chartung17 671 98 9ms 31 Dec 2023 617th Shanethegamer 🇺🇸 671 98 10ms 24 Jan 2024 617th cardosoo 671 98 9ms 6 Oct 2024 617th Artemis21 🇬🇧 671 98 10ms 21 Dec 2024 617th andrewjc2000 671 98 10ms 2 Jul 2025 617th Nhan-TRANvan_keyloop 671 98 9ms 20 Aug 2025 617th countlpaul-dotcom 671 98 10ms 19 Oct 2025 627th error256 671 113 68ms 28 Jun 2024 628th bzijlema 🇳🇱 671 160 271ms 30 Jan 2024 629th aksyristos 670 77 34ms 31 Jan 2023 629th tatzyr 🇯🇵 670 77 52ms 10 Dec 2024 631st primo-ppcg 🇹🇭 670 117 111ms 1 May 2023 632nd MeWhenI 🇻🇦 670 119 97ms 15 Oct 2022 633rd aposteriorist 🇨🇦 670 136 463ms 4 Mar 2022 634th clockworknazo 667 87 2ms 15 Nov 2022 635th kops-cg 667 118 133ms 14 Apr 2021 636th Grrisly 666 116 1ms 7 Nov 2023 637th dokutan 665 87 384ms 30 Apr 2024 638th MateuszPietrzak 🇵🇱 665 138 2,790ms 17 Nov 2023 639th MeWhenI 🇻🇦 664 93 350ms 17 Jan 2024 639th emgordon154 664 93 397ms 7 Jun 2025 First Prev 561–640 of 2,425 Next Last
