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 881st sk- 577 114 9ms 11 Sep 2020 881st SB-945 577 114 9ms 17 Apr 2024 881st FlorianCassayre 🇫🇷 577 114 11ms 24 May 2024 881st HumanoidCPU 577 114 11ms 9 May 2025 885th filharmonista 577 134 2ms 23 Nov 2019 885th slerpyyy 🇩🇪 577 134 2ms 3 Nov 2022 887th Shanethegamer 🇺🇸 577 159 440ms 29 Apr 2022 888th SirBogman 🇺🇸 577 330 13ms 23 Nov 2022 889th Ernest1338 575 163 194ms 6 Oct 2023 890th ForkKILLET 🇨🇳 574 126 8ms 17 Feb 2021 890th lukasmoellerch 574 126 8ms 28 Apr 2021 892nd Shanethegamer 🇺🇸 574 139 97ms 31 Oct 2022 893rd olivermrose 🇺🇸 573 90 42ms 31 Oct 2021 894th fabi1511 572 115 9ms 1 May 2020 894th amollberg 🇸🇪 572 115 11ms 21 Jan 2022 894th weeble 572 115 9ms 23 Dec 2024 897th Shanethegamer 🇺🇸 572 191 64ms 29 Apr 2022 898th MeWhenI 🇻🇦 569 58 3ms 4 Feb 2022 899th Irratix 🇳🇱 568 136 2ms 25 Dec 2021 899th Shanethegamer 🇺🇸 568 136 2ms 28 Apr 2022 899th jupj 🇫🇮 568 136 2ms 19 Aug 2022 899th emgordon154 568 136 2ms 25 Jul 2024 903rd acornellier 567 91 33ms 9 Dec 2018 903rd emgordon154 567 91 35ms 4 Jul 2024 903rd lacrosse 567 91 37ms 19 days ago 906th msrawson 567 116 10ms 6 Aug 2018 906th SimonPeatman 567 116 9ms 2 Feb 2019 906th bob-th 567 116 10ms 26 Aug 2022 906th NerdyMcNerd42 567 116 9ms 4 Feb 2023 906th randolchance 567 116 9ms 5 Feb 2023 906th Mathrew2012 567 116 9ms 9 Nov 2024 906th Emutis 🇱🇹 567 116 10ms 19 Sep 2025 913th MeWhenI 🇻🇦 567 272 1,660ms 7 Nov 2025 914th CarsonChr 🇺🇸 565 128 9ms 6 Apr 2024 914th Andrey-Plotnikov 565 128 9ms 23 Jun 2025 916th Shanethegamer 🇺🇸 564 95 4ms 16 Aug 2024 917th neihousaigaai 563 176 404ms 30 Apr 2021 918th juliansiebert 🇩🇪 562 86 266ms 23 Jul 2022 918th krcs 🇵🇱 562 86 244ms 15 Oct 2024 920th ian-h-chamberlain 🇺🇸 562 117 10ms 29 Dec 2019 920th 77Tigers 562 117 10ms 28 Feb 2021 920th juan-cazalvilla 562 117 10ms 1 Aug 2022 920th georgehulme 562 117 10ms 7 Oct 2022 920th adamnielson42 🇺🇸 562 117 15ms 30 Jan 2025 920th CommandLeo 🇮🇹 562 117 13ms 14 Nov 2025 926th Kloppermand 🇩🇰 562 153 371ms 6 Jan 2023 927th SpareManiKatti 561 129 8ms 13 Oct 2021 927th Nico-Kasz 561 129 8ms 19 Apr 2022 927th adamnielson42 🇺🇸 561 129 9ms 25 Apr 2023 930th marcin7Cd 561 225 2ms 31 Aug 2019 931st mcreenan 560 81 149ms 20 Jun 2018 932nd Andriamanitra 🇫🇮 560 92 45ms 20 Jul 2022 933rd c0d3-4-F00d 🇩🇪 560 138 1ms 8 Feb 2022 934th benson-z 560 177 419ms 1 Sep 2023 935th aditsu 559 157 2,992ms 25 days ago 936th emgordon154 558 126 137ms 26 Nov 2024 937th JVerwolf 557 118 9ms 24 Aug 2021 937th PaulMWeiser 557 118 9ms 28 Feb 2023 937th PickausernamePi 557 118 9ms 28 Sep 2023 940th shuding 557 130 8ms 6 May 2020 941st TFeld00 🇩🇰 554 93 37ms 8 Jun 2019 941st KatieLG 🇬🇧 554 93 33ms 10 Apr 2022 941st OhmNomNom 554 93 42ms 20 Oct 2022 941st neihousaigaai 554 93 40ms 13 Feb 2024 945th Yewzir 🇧🇪 554 144 97ms 28 Mar 2024 946th klixel 🇨🇦 554 169 149ms 9 Jun 2023 947th zdzc 553 119 9ms 25 Apr 2019 947th lukasthaler 553 119 10ms 11 Sep 2020 947th cefqrn 553 119 9ms 20 Dec 2022 947th sjrct 553 119 10ms 5 Aug 2024 947th Andrey2001 553 119 10ms 23 days ago 952nd JOrE20 🇺🇸 553 131 9ms 17 Nov 2025 953rd Mabeloid 🇳🇴 551 112 456ms 19 Sep 2024 953rd HumanoidCPU 551 112 569ms 9 May 2025 955th joelgduggan 551 156 371ms 21 Nov 2021 955th Andriamanitra 🇫🇮 551 156 3ms 13 Jun 2024 957th akusumoto 🇯🇵 551 170 154ms 6 Apr 2022 958th Irratix 🇳🇱 550 167 482ms 3 Jan 2022 959th error256 548 94 41ms 18 May 2024 960th ludwig-n 548 120 10ms 4 Apr 2020 First Prev 881–960 of 2,425 Next Last
