The Calendar hole will go live in approximately 13 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 319th michelebastione 🇮🇹 489 137 10ms 7 Nov 2019 319th wrhm 489 137 9ms 12 Dec 2020 319th abailey2020 🇺🇸 489 137 10ms 13 Dec 2020 319th asheeri 489 137 10ms 31 Aug 2021 319th galloj 🇨🇿 489 137 9ms 18 Aug 2022 319th J09M 489 137 10ms 25 Sep 2025 327th yettinmoor 486 138 9ms 29 Aug 2020 327th Ailko 🇧🇪 486 138 9ms 12 May 2022 327th Azearia 486 138 11ms 18 May 2025 330th itiievskyi 🇺🇦 482 139 9ms 11 Aug 2020 330th The3gs 482 139 9ms 13 Oct 2020 330th Fishron 482 139 39ms 14 Oct 2021 330th sleepyStick 482 139 9ms 7 Dec 2021 330th lomarbrick 482 139 9ms 19 May 2023 330th Jaydosu 482 139 9ms 25 Jun 2024 330th lhulinsky 482 139 11ms 21 Oct 2024 330th klixel 🇨🇦 482 139 11ms 19 Jun 2025 338th AkashTandon167 479 140 11ms 9 Dec 2020 339th Deepztream 475 141 9ms 2 Sep 2018 339th Mojken 475 141 10ms 2 Sep 2018 339th Starwort 🇬🇧 475 141 9ms 17 Nov 2018 339th KiwiKoder0123 475 141 9ms 8 Jul 2019 339th jtaxen 475 141 9ms 18 Apr 2024 339th inverseLorentz 🇦🇺 475 141 10ms 10 May 2024 345th Pena86 472 142 10ms 26 Dec 2021 345th lemogne 472 142 9ms 3 Jun 2022 345th 2011-Chan-Ethan 472 142 11ms 12 Jul 2023 348th TobyBoyne 🇬🇧 469 143 9ms 18 Feb 2022 348th ridingqwerty 🇺🇸 469 143 9ms 22 days ago 350th Trunksistor 🇫🇷 465 144 10ms 12 Apr 2022 350th SomeKitten 🇺🇸 465 144 10ms 21 Aug 2022 350th Bodo171 465 144 9ms 29 Nov 2022 353rd achow0 462 145 9ms 23 Oct 2020 353rd richard-oelze 🇩🇪 462 145 10ms 14 Mar 2022 353rd TheZappie 462 145 9ms 30 Mar 2022 353rd kenny14231 462 145 9ms 6 Aug 2022 353rd jorisbertram 462 145 9ms 26 Aug 2022 353rd roguh 🇬🇹 462 145 9ms 11 Jan 2024 353rd Stockoh 🇫🇷 462 145 11ms 1 May 2024 353rd SectorCorruptor 462 145 9ms 14 Aug 2025 361st wilkij1 459 146 9ms 17 Jun 2018 361st rowboat1 459 146 9ms 18 Jun 2022 361st jhpaques 🇫🇷 459 146 10ms 28 Jul 2022 361st Rambso 459 146 10ms 5 Feb 2023 365th therealbobo 456 147 9ms 23 Apr 2020 365th jfallon1997 456 147 10ms 16 Aug 2022 365th sbyrne51 456 147 9ms 5 Oct 2022 365th cthierfelder 🇲🇨 456 147 9ms 12 Nov 2025 369th ionutm82 453 148 9ms 21 Feb 2019 369th Ted-Barrett 🇦🇺 453 148 9ms 2 Oct 2021 369th bogosorter 453 148 9ms 9 Jul 2025 372nd petroselo 450 149 9ms 29 Dec 2021 372nd shibacho 🇯🇵 450 149 9ms 11 Nov 2022 374th amishtal 447 150 10ms 26 Dec 2019 374th jbjd 447 150 9ms 30 Jun 2024 374th evan18c 447 150 10ms 22 Apr 2025 377th jarekwg 444 151 9ms 9 May 2019 377th Haksell 🇦🇶 444 151 17ms 1 Dec 2019 377th karhuthebear 444 151 9ms 11 May 2022 377th LocNgu 444 151 9ms 21 Jul 2023 377th pde-bakk 🇳🇱 444 151 9ms 25 Oct 2023 377th lucasging 444 151 9ms 26 May 2025 377th 123mjb 444 151 9ms 5 Jun 2025 377th fuzzylojik-golf 🇺🇸 444 151 10ms 14 Jun 2025 385th rishavb123 441 152 10ms 19 Jul 2018 385th DaleNaci 441 152 9ms 19 Jul 2018 385th ngynkvn 441 152 9ms 27 Sep 2021 385th za3k 441 152 9ms 9 Oct 2022 385th tpremoli 441 152 10ms 9 Jul 2025 390th l-donovan 438 153 9ms 31 Jan 2024 390th croc54 438 153 9ms 30 Dec 2024 392nd ly0va 435 154 9ms 8 Jan 2019 392nd DarkTemplar5 435 154 10ms 10 Oct 2020 392nd hellwue 435 154 11ms 1 Mar 2022 392nd BerkeAltiparmak 435 154 11ms 22 May 2022 392nd sultan 435 154 10ms 6 Jun 2022 392nd Anananas42 435 154 9ms 6 Aug 2022 392nd JesseNoEyes 🇺🇸 435 154 9ms 24 Nov 2024 399th Re-Adventures 🇮🇳 432 155 9ms 8 Feb 2022 399th resoNathan 432 155 10ms 3 May 2024 First Prev 321–400 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