The Calendar hole will go live in approximately 3 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 481st Reconcyl 722 109 129ms 5 Jan 2019 481st RussellEmerine 722 109 124ms 27 Feb 2020 483rd Gaddy 🇫🇷 722 119 348ms 12 May 2022 484th emgordon154 721 130 169ms 14 Mar 2025 485th stefangimmillaro 719 111 99ms 15 Oct 2022 486th CLOStrophobic 🇮🇹 718 124 7ms 23 Apr 2025 487th MeWhenI 🇻🇦 718 138 459ms 7 Nov 2025 487th DardS8Br 718 138 421ms 23 days ago 489th NewDefectus 🇮🇱 717 77 51ms 6 Dec 2021 490th KatieLG 🇬🇧 717 92 891ms 22 Oct 2021 490th error256 717 92 773ms 31 Oct 2025 492nd thisishowmymindworks 🇳🇴 717 101 9ms 5 Oct 2020 493rd ovs-code 🇩🇪 717 108 70ms 12 Sep 2024 494th csharpython 716 72 37ms 28 Aug 2025 495th user189032 716 110 120ms 29 May 2019 496th yzhs 🇩🇪 715 92 9ms 18 Jan 2020 496th prplz 🇦🇺 715 92 10ms 28 Dec 2021 496th StefanHabel 🇨🇦 715 92 9ms 12 Dec 2022 496th betaveros 715 92 10ms 30 Dec 2022 496th markusgraube 715 92 10ms 2 Jul 2023 496th OwPowell 715 92 10ms 18 Dec 2023 496th CommandLeo 🇮🇹 715 92 10ms 2 days ago 503rd Andriamanitra 🇫🇮 714 81 374ms 23 Jul 2023 504th MeWhenI 🇻🇦 713 112 5ms 12 Sep 2022 505th typeswitch-dev 🇵🇹 712 122 3ms 22 Jul 2023 506th Shanethegamer 🇺🇸 711 112 1,274ms 24 Jan 2024 507th dokutan 711 130 8ms 8 May 2024 508th primo-ppcg 🇹🇭 711 151 265ms 17 Apr 2020 509th dee-gomma 710 102 9ms 31 Mar 2019 509th uttumuttu 🇫🇮 710 102 8ms 6 Jan 2022 511th bendapootie 710 121 345ms 21 Nov 2021 511th iznax 710 121 363ms 21 Nov 2021 513th yokasuretsu 709 64 138ms 21 Jun 2018 514th neihousaigaai 709 93 998ms 13 Feb 2024 515th arjanadriaanse 🇳🇱 709 111 122ms 7 Feb 2022 516th giacomogallina 707 93 17ms 14 Jun 2019 516th LlamaLad7 🇬🇧 707 93 9ms 15 Mar 2020 516th loserface69 707 93 9ms 15 Mar 2020 516th MeWhenI 🇻🇦 707 93 10ms 28 Oct 2021 516th Kloppermand 🇩🇰 707 93 9ms 6 Jan 2023 516th FEZfan 🇦🇺 707 93 9ms 11 Jul 2025 516th jesterjunk 707 93 9ms 23 Sep 2025 523rd FlyingPenguin223 706 73 39ms 7 Nov 2023 523rd DialFrost 🇸🇬 706 73 35ms 2 Jun 2024 523rd Lv0Sys 🇵🇱 706 73 37ms 27 days ago 526th qwertyuiop3 🇷🇺 706 130 63ms 29 May 2025 527th GrayJoKing 🇦🇺 705 76 4ms 11 Sep 2024 528th omurakazuaki 🇯🇵 703 103 9ms 18 Feb 2021 528th neihousaigaai 703 103 9ms 17 Mar 2021 530th 4hg 🇺🇸 702 94 1,028ms 8 Dec 2022 531st Shanethegamer 🇺🇸 701 88 417ms 24 Jan 2024 531st CaedenHarper 🇨🇦 701 88 454ms 28 Jan 2025 533rd btjones0 699 94 10ms 7 Dec 2021 533rd OllieBoyne 🇬🇧 699 94 9ms 17 Sep 2022 533rd Eilonlif 🇮🇱 699 94 9ms 4 Nov 2022 533rd stefangimmillaro 699 94 10ms 6 Jul 2023 533rd mathisfun271 699 94 9ms 16 Dec 2023 533rd albanian-laundromat 699 94 12ms 17 Apr 2025 533rd Keegan-T 🇨🇦 699 94 9ms 22 Apr 2025 540th Euler-37 699 106 39ms 4 Jun 2023 541st Yewzir 🇧🇪 698 221 2,560ms 14 Nov 2025 542nd pilaf 🇦🇷 697 74 36ms 8 Apr 2022 542nd sisyphus-ppcg 🇦🇺 697 74 38ms 18 Oct 2023 544th trinityy-7 696 104 9ms 22 Jul 2025 545th MeWhenI 🇻🇦 696 111 1ms 13 Aug 2024 546th dokutan 696 119 2ms 22 days ago 547th KasperKivimaeki 🇫🇮 695 132 2,429ms 20 Nov 2025 548th steffan-polygolf 694 89 416ms 7 Mar 2024 549th tomtheisen 🇺🇸 692 95 9ms 4 Dec 2019 549th jiaminglimjm 🇲🇾 692 95 10ms 29 Feb 2020 549th Yewzir 🇧🇪 692 95 10ms 14 Apr 2023 549th NanduBC 692 95 9ms 6 Sep 2024 549th EnTerr 692 95 10ms 15 Sep 2024 549th wuduculfre 692 95 10ms 21 Jul 2025 555th emgordon154 692 223 1,848ms 6 days ago 556th retrohun 691 85 1ms 25 Aug 2024 557th Attero 🇸🇪 690 112 2ms 28 May 2020 557th keelimeguy 🇺🇸 690 112 2ms 4 Nov 2023 559th anastos 690 114 120ms 23 Jul 2018 559th DanielVenable 690 114 122ms 26 Mar 2025 First Prev 481–560 of 2,426 Next Last
