The Calendar hole will go live in approximately 13 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 Shanethegamer 🇺🇸 688 114 104ms 10 Dec 2022 562nd tdkkdt 🇷🇺 688 125 404ms 21 Nov 2021 563rd yzzyx 688 156 266ms 21 Apr 2020 564th jared-hughes 687 75 45ms 12 Oct 2022 565th DestyNova 🇮🇪 687 96 992ms 13 Aug 2022 566th b-jam 685 96 11ms 7 Dec 2019 566th Attero 🇸🇪 685 96 10ms 5 Oct 2020 566th ragmani 685 96 9ms 18 Dec 2020 569th sean-niemann 🇺🇸 685 134 512ms 4 Jan 2022 569th keelimeguy 🇺🇸 685 134 391ms 4 Nov 2023 571st MichalMarsalek 🇨🇿 685 184 2ms 2 Apr 2022 572nd sean-niemann 🇺🇸 684 113 1ms 5 Jan 2022 572nd Heathcorp 🇦🇺 684 113 1ms 25 Oct 2022 572nd snoozingnewt 🇨🇦 684 113 1ms 23 Sep 2023 572nd madex 🇩🇪 684 113 2ms 9 Jul 2024 572nd LostSyntax21 🇬🇧 684 113 2ms 2 Dec 2024 572nd LvLError 684 113 2ms 29 May 2025 572nd Lv0Sys 🇵🇱 684 113 2ms 30 May 2025 579th cbrt-x 684 115 112ms 4 Oct 2023 580th verticallity 684 137 154ms 6 Apr 2022 581st emplv 🇱🇻 683 93 4ms 3 Oct 2023 582nd janbehrens 🇩🇪 683 106 9ms 20 Jul 2022 582nd DialFrost 🇸🇬 683 106 8ms 5 Oct 2023 584th bendiscz 683 157 268ms 18 Apr 2020 585th steffan-polygolf 682 116 266ms 7 Mar 2024 586th AdrienHache 🇫🇷 682 126 425ms 18 days ago 587th pilaf 🇦🇷 680 97 1,122ms 6 Apr 2022 587th Andriamanitra 🇫🇮 680 97 1,105ms 2 Jan 2024 589th AutumnWind75 680 135 429ms 8 days ago 590th jacobly0 🇺🇸 680 227 1,725ms 22 Apr 2024 591st elgan65536 679 138 127ms 22 Oct 2023 592nd KatieLG 🇬🇧 678 91 340ms 3 Aug 2025 593rd davitf 678 97 9ms 6 Jul 2020 593rd mokymok 🇺🇸 678 97 9ms 17 Nov 2021 593rd jdw1023 678 97 10ms 26 Apr 2022 593rd Bubbler-4 678 97 9ms 2 Nov 2022 593rd rollershutter 678 97 9ms 30 Jan 2024 593rd Powerroff 678 97 10ms 4 May 2024 593rd plcc0 678 97 10ms 5 Mar 2025 593rd emgordon154 678 97 9ms 7 Jun 2025 601st RockOfStone 678 120 1ms 9 Mar 2024 602nd prplz 🇦🇺 678 137 495ms 20 Oct 2020 603rd janbehrens 🇩🇪 677 127 382ms 17 Apr 2025 603rd MeWhenI 🇻🇦 677 127 344ms 19 Jun 2025 605th lukegustafson 🇺🇸 676 107 10ms 24 Jun 2024 606th MeWhenI 🇻🇦 674 110 40ms 29 Apr 2025 607th AlephSquirrel 673 49 37ms 28 Jul 2022 607th Natanaelel 🇸🇪 673 49 3ms 20 Jul 2023 607th lifthrasiir 🇰🇷 673 49 2ms 28 Nov 2024 607th emgordon154 673 49 2ms 18 Nov 2025 611th cake287 673 117 123ms 15 Jan 2023 612th Phil-RGOMEGA 673 121 1ms 31 May 2023 613th Shanethegamer 🇺🇸 673 138 100ms 29 Apr 2022 614th Feniske 🇫🇷 671 72 229ms 10 Nov 2023 615th Yewzir 🇧🇪 671 92 513ms 4 Feb 2024 616th Indivicivet 671 98 9ms 11 Mar 2021 616th IshanPanpaliya 671 98 9ms 6 Oct 2022 616th celiendonze 🇨🇭 671 98 10ms 18 Apr 2023 616th chartung17 671 98 9ms 31 Dec 2023 616th Shanethegamer 🇺🇸 671 98 10ms 24 Jan 2024 616th cardosoo 671 98 9ms 6 Oct 2024 616th Artemis21 🇬🇧 671 98 10ms 21 Dec 2024 616th andrewjc2000 671 98 10ms 2 Jul 2025 616th Nhan-TRANvan_keyloop 671 98 9ms 20 Aug 2025 616th countlpaul-dotcom 671 98 10ms 19 Oct 2025 626th error256 671 113 68ms 28 Jun 2024 627th bzijlema 🇳🇱 671 160 271ms 30 Jan 2024 628th aksyristos 670 77 34ms 31 Jan 2023 628th tatzyr 🇯🇵 670 77 52ms 10 Dec 2024 630th primo-ppcg 🇹🇭 670 117 111ms 1 May 2023 631st MeWhenI 🇻🇦 670 119 97ms 15 Oct 2022 632nd aposteriorist 🇨🇦 670 136 463ms 4 Mar 2022 633rd clockworknazo 667 87 2ms 15 Nov 2022 634th kops-cg 667 118 133ms 14 Apr 2021 635th Grrisly 666 116 1ms 7 Nov 2023 636th dokutan 665 87 384ms 30 Apr 2024 637th MateuszPietrzak 🇵🇱 665 138 2,790ms 17 Nov 2023 638th MeWhenI 🇻🇦 664 93 350ms 17 Jan 2024 638th emgordon154 664 93 397ms 7 Jun 2025 638th albanian-laundromat 664 93 603ms 5 Oct 2025 First Prev 561–640 of 2,425 Next Last
