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 801st Irratix 🇳🇱 564 136 2ms 25 Dec 2021 801st Shanethegamer 🇺🇸 564 136 2ms 28 Apr 2022 801st jupj 🇫🇮 564 136 2ms 19 Aug 2022 801st emgordon154 564 136 2ms 25 Jul 2024 805th MeWhenI 🇻🇦 564 272 1,660ms 7 Nov 2025 806th DialFrost 🇸🇬 563 57 3ms 7 Feb 2024 807th elisherer 🇮🇱 563 65 132ms 20 Apr 2019 808th 4hg 🇺🇸 562 81 36ms 29 Sep 2022 808th inventshah 562 81 39ms 24 Sep 2023 810th CarsonChr 🇺🇸 562 128 8ms 6 Apr 2024 810th Andrey-Plotnikov 562 128 9ms 23 Jun 2025 812th MeWhenI 🇻🇦 560 93 350ms 17 Jan 2024 813th Indivicivet 560 98 9ms 11 Mar 2021 813th SomeKitten 🇺🇸 560 98 9ms 22 Aug 2022 813th IshanPanpaliya 560 98 9ms 6 Oct 2022 813th celiendonze 🇨🇭 560 98 10ms 18 Apr 2023 813th chartung17 560 98 9ms 31 Dec 2023 813th cardosoo 560 98 9ms 6 Oct 2024 813th andrewjc2000 560 98 10ms 2 Jul 2025 813th Nhan-TRANvan_keyloop 560 98 9ms 20 Aug 2025 813th countlpaul-dotcom 560 98 10ms 19 Oct 2025 822nd neihousaigaai 559 176 404ms 30 Apr 2021 823rd SpareManiKatti 558 129 8ms 13 Oct 2021 823rd Nico-Kasz 558 129 8ms 19 Apr 2022 823rd adamnielson42 🇺🇸 558 129 9ms 25 Apr 2023 826th Kloppermand 🇩🇰 558 153 371ms 6 Jan 2023 827th marcin7Cd 557 225 2ms 31 Aug 2019 828th c0d3-4-F00d 🇩🇪 556 138 1ms 8 Feb 2022 829th benson-z 556 177 419ms 1 Sep 2023 830th Waffle3z 555 82 36ms 17 Oct 2020 830th AgentIvan 🇺🇦 555 82 37ms 28 Jan 2021 832nd drew-loukusa 555 99 9ms 26 May 2020 832nd Secozzi 555 99 9ms 20 Oct 2020 832nd seanshpark 555 99 10ms 18 Dec 2020 832nd soalyer 555 99 10ms 9 Nov 2021 832nd CodyMiner 555 99 10ms 14 Nov 2021 832nd MichalMarsalek 🇨🇿 555 99 9ms 23 Oct 2022 832nd logvp 555 99 10ms 6 Oct 2024 832nd BREMAUCY 🇫🇷 555 99 10ms 7 Aug 2025 840th juliansiebert 🇩🇪 554 86 240ms 23 Jul 2022 840th krcs 🇵🇱 554 86 215ms 15 Oct 2024 842nd FEZfan 🇦🇺 554 94 485ms 26 Apr 2025 843rd MeWhenI 🇻🇦 553 58 3ms 4 Feb 2022 844th Shanethegamer 🇺🇸 553 95 4ms 16 Aug 2024 845th shuding 553 130 8ms 6 May 2020 845th dokutan 553 130 9ms 20 Apr 2025 847th aditsu 552 157 2,992ms 23 Nov 2025 848th klixel 🇨🇦 550 169 144ms 9 Jun 2023 849th PiterAnnema 549 100 9ms 23 Mar 2022 849th neihousaigaai 549 100 9ms 17 Apr 2022 849th Heathcorp 🇦🇺 549 100 11ms 2 Dec 2022 849th aksyristos 549 100 9ms 2 Feb 2023 849th madex 🇩🇪 549 100 9ms 9 Jul 2024 849th LostSyntax21 🇬🇧 549 100 10ms 2 Dec 2024 849th Pyroan 549 100 10ms 21 Feb 2025 849th evan18c 549 100 9ms 22 Apr 2025 849th LvLError 549 100 10ms 29 May 2025 849th Flekay 🇩🇪 549 100 10ms 10 Jul 2025 849th vgamula 🇺🇦 549 100 9ms 5 Aug 2025 860th Yewzir 🇧🇪 547 144 97ms 28 Mar 2024 861st joelgduggan 547 156 371ms 21 Nov 2021 862nd akusumoto 🇯🇵 547 170 154ms 6 Apr 2022 863rd mcreenan 546 67 135ms 20 Jun 2018 864th Irratix 🇳🇱 546 167 408ms 3 Jan 2022 865th Natanaelel 🇸🇪 545 132 9ms 11 May 2022 865th CallanMcNulty 545 132 9ms 30 Sep 2022 865th aksyristos 545 132 8ms 28 Dec 2022 868th Andriamanitra 🇫🇮 545 156 3ms 13 Jun 2024 869th NewDefectus 🇮🇱 544 101 9ms 21 Apr 2021 869th eddvrs 544 101 9ms 20 Aug 2022 869th commandblockguy 🇺🇸 544 101 9ms 29 Sep 2022 869th benson-z 544 101 9ms 6 Dec 2024 873rd Herbert00709 🇵🇱 544 141 2ms 8 Jun 2024 874th aliakseikalosha 544 157 388ms 22 Oct 2024 875th MeWhenI 🇻🇦 543 188 24ms 7 Jun 2023 876th vibdev 541 133 9ms 26 Aug 2021 877th Jandoife 540 142 2ms 9 Dec 2022 878th Shanethegamer 🇺🇸 540 158 353ms 9 Apr 2025 879th Ashray-g 🇺🇸 540 182 408ms 1 Sep 2023 880th scpchicken 🇵🇼 538 102 9ms 26 Mar 2022 First Prev 801–880 of 2,411 Next Last