The Calendar hole will go live in approximately 5 days. Why not try and solve it ahead of time?
Diamonds in Python 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 158th redbeancola 638 105 9ms 5 Nov 2021 158th mousetail 🇳🇱 638 105 9ms 2 Nov 2022 158th M0PKOBKA 638 105 10ms 21 Dec 2022 158th janbehrens 🇩🇪 638 105 9ms 17 Jun 2023 158th AlexanderFair 638 105 10ms 26 Jun 2023 158th fgrosshans 🇫🇷 638 105 9ms 17 Jul 2024 158th edsrzf 🇳🇿 638 105 9ms 22 Nov 2024 158th Babafaba 638 105 9ms 23 Nov 2025 169th decorator-factory 632 106 12ms 24 May 2019 169th mosho-p 632 106 10ms 11 Oct 2022 169th Europe2048 632 106 9ms 21 Nov 2024 169th dirckvdende 632 106 10ms 9 Jul 2025 169th qpwoeirut 632 106 10ms 19 Nov 2025 174th garrisonhh 626 107 9ms 25 Nov 2020 174th Fracture17 626 107 9ms 4 Apr 2023 174th quimey 626 107 9ms 21 Jun 2023 177th dzhang314 620 108 10ms 13 Aug 2019 177th cubed-guy 620 108 9ms 3 Apr 2022 177th jakobkordez 🇸🇮 620 108 10ms 31 Oct 2022 177th b10011 🇫🇮 620 108 10ms 7 Jan 2023 177th cykim8811 620 108 9ms 9 Jul 2024 177th cros107 🇦🇺 620 108 9ms 21 days ago 183rd Mr-Xcoder 615 109 9ms 17 Jun 2018 183rd geofft 615 109 9ms 10 Dec 2020 183rd Marsolo1 615 109 10ms 18 Apr 2023 183rd TaserTheFox 🇺🇸 615 109 9ms 2 May 2023 183rd smilesformiles3 615 109 9ms 14 Jun 2025 183rd jacekwladzinski 615 109 9ms 5 Oct 2025 189th Andre3582 609 110 9ms 27 Oct 2020 189th jacklynnepenick 609 110 16ms 20 Aug 2021 191st adoxography 604 111 10ms 3 Oct 2019 191st suchwise 604 111 10ms 29 Oct 2019 191st mortimervonchappuis 604 111 10ms 16 Mar 2020 191st luftj 604 111 10ms 9 Jul 2020 191st dgambit 604 111 9ms 5 May 2021 191st clementblaudeau 604 111 11ms 2 Jun 2021 191st knutae 🇳🇴 604 111 10ms 1 Dec 2021 191st JudeTyrrell 604 111 9ms 6 Oct 2024 191st WillConker 604 111 9ms 25 Oct 2024 200th TessSSBM 598 112 10ms 14 Oct 2019 200th OwenElliottDev 598 112 9ms 26 Jul 2020 200th BrenSchaap 598 112 9ms 21 Oct 2021 200th guilhem-roy 🇫🇷 598 112 10ms 25 Feb 2022 200th Mabeloid 🇳🇴 598 112 9ms 19 Sep 2024 205th skps2010 593 113 9ms 12 Jan 2019 205th Iluvatar 593 113 10ms 11 May 2020 205th Psirving 593 113 9ms 2 Aug 2020 205th constant-stranger 593 113 9ms 7 Feb 2022 205th CedricGebistorf 593 113 10ms 5 Mar 2022 205th draxler-h 593 113 9ms 13 Jan 2023 205th brimstonetrader 593 113 9ms 26 Mar 2024 212th sk- 588 114 9ms 11 Sep 2020 212th SB-945 588 114 9ms 17 Apr 2024 212th FlorianCassayre 🇫🇷 588 114 11ms 24 May 2024 212th HumanoidCPU 588 114 11ms 9 May 2025 216th fabi1511 583 115 9ms 1 May 2020 216th amollberg 🇸🇪 583 115 11ms 21 Jan 2022 216th weeble 583 115 9ms 23 Dec 2024 219th msrawson 578 116 10ms 6 Aug 2018 219th SimonPeatman 578 116 9ms 2 Feb 2019 219th bob-th 578 116 10ms 26 Aug 2022 219th NerdyMcNerd42 578 116 9ms 4 Feb 2023 219th randolchance 578 116 9ms 5 Feb 2023 219th Mathrew2012 578 116 9ms 9 Nov 2024 219th Emutis 🇱🇹 578 116 10ms 19 Sep 2025 226th ian-h-chamberlain 🇺🇸 573 117 10ms 29 Dec 2019 226th 77Tigers 573 117 10ms 28 Feb 2021 226th juan-cazalvilla 573 117 10ms 1 Aug 2022 226th georgehulme 573 117 10ms 7 Oct 2022 226th adamnielson42 🇺🇸 573 117 15ms 30 Jan 2025 231st JVerwolf 568 118 9ms 24 Aug 2021 231st PaulMWeiser 568 118 9ms 28 Feb 2023 231st PickausernamePi 568 118 9ms 28 Sep 2023 234th zdzc 563 119 9ms 25 Apr 2019 234th lukasthaler 563 119 10ms 11 Sep 2020 234th cefqrn 563 119 9ms 20 Dec 2022 234th sjrct 563 119 10ms 5 Aug 2024 234th Andrey2001 563 119 10ms 25 Nov 2025 239th ludwig-n 558 120 10ms 4 Apr 2020 239th andre-lameirinhas 🇵🇹 558 120 16ms 4 Nov 2020 First Prev 161–240 of 584 Next Last