The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Diamonds in Python 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 318th eiburns 424 132 9ms 18 Sep 2023 318th namelessiw 424 132 9ms 5 Mar 2024 323rd ehulinsky 🇺🇸 421 133 62ms 10 Nov 2021 323rd GodlyProgrammer1 421 133 10ms 20 days ago 325th rschwa6308 🇺🇸 418 134 10ms 18 Aug 2021 325th scottwday 🇨🇦 418 134 9ms 4 Dec 2021 325th Andrey135296 418 134 13ms 25 Nov 2024 328th dyc3 415 135 9ms 8 Aug 2020 328th SniperSmiley 🇺🇸 415 135 9ms 23 Jun 2021 328th bbakersmith 415 135 10ms 15 Jul 2021 328th xDavidL 415 135 9ms 18 Feb 2022 328th codewrite 🇬🇧 415 135 10ms 4 Jul 2025 333rd SirFireball3521 412 136 9ms 25 Jan 2023 333rd vhoulbreque 🇫🇷 412 136 9ms 17 days ago 335th bkshrader 409 137 10ms 31 Dec 2018 335th alangodfrey 409 137 10ms 10 Jun 2019 335th michelebastione 🇮🇹 409 137 10ms 7 Nov 2019 335th wrhm 409 137 9ms 12 Dec 2020 335th abailey2020 🇺🇸 409 137 10ms 13 Dec 2020 335th asheeri 409 137 10ms 31 Aug 2021 335th galloj 🇨🇿 409 137 9ms 18 Aug 2022 335th J09M 409 137 10ms 25 Sep 2025 343rd yettinmoor 406 138 9ms 29 Aug 2020 343rd Ailko 🇧🇪 406 138 9ms 12 May 2022 343rd Azearia 406 138 11ms 18 May 2025 346th itiievskyi 🇺🇦 403 139 9ms 11 Aug 2020 346th The3gs 403 139 9ms 13 Oct 2020 346th sleepyStick 403 139 9ms 7 Dec 2021 346th lomarbrick 403 139 9ms 19 May 2023 346th Jaydosu 403 139 9ms 25 Jun 2024 346th lhulinsky 403 139 11ms 21 Oct 2024 346th klixel 🇨🇦 403 139 11ms 19 Jun 2025 353rd AkashTandon167 400 140 11ms 9 Dec 2020 354th Deepztream 397 141 9ms 2 Sep 2018 354th Mojken 397 141 10ms 2 Sep 2018 354th Starwort 🇬🇧 397 141 9ms 17 Nov 2018 354th KiwiKoder0123 397 141 9ms 8 Jul 2019 354th jtaxen 397 141 9ms 18 Apr 2024 354th inverseLorentz 🇦🇺 397 141 10ms 10 May 2024 360th Pena86 394 142 10ms 26 Dec 2021 360th lemogne 394 142 9ms 3 Jun 2022 362nd TobyBoyne 🇬🇧 392 143 9ms 18 Feb 2022 362nd ridingqwerty 🇺🇸 392 143 9ms 22 days ago 364th Trunksistor 🇫🇷 389 144 10ms 12 Apr 2022 364th Bodo171 389 144 9ms 29 Nov 2022 366th achow0 386 145 9ms 23 Oct 2020 366th richard-oelze 🇩🇪 386 145 10ms 14 Mar 2022 366th TheZappie 386 145 9ms 30 Mar 2022 366th kenny14231 386 145 9ms 6 Aug 2022 366th jorisbertram 386 145 9ms 26 Aug 2022 366th roguh 🇬🇹 386 145 9ms 11 Jan 2024 366th Stockoh 🇫🇷 386 145 11ms 1 May 2024 366th SectorCorruptor 386 145 9ms 14 Aug 2025 374th wilkij1 384 146 9ms 17 Jun 2018 374th rowboat1 384 146 9ms 18 Jun 2022 374th jhpaques 🇫🇷 384 146 10ms 28 Jul 2022 374th Rambso 384 146 10ms 5 Feb 2023 378th therealbobo 381 147 9ms 23 Apr 2020 378th jfallon1997 381 147 10ms 16 Aug 2022 378th sbyrne51 381 147 9ms 5 Oct 2022 378th cthierfelder 🇲🇨 381 147 9ms 12 Nov 2025 382nd ionutm82 378 148 9ms 21 Feb 2019 382nd Ted-Barrett 🇦🇺 378 148 9ms 2 Oct 2021 382nd bogosorter 378 148 9ms 9 Jul 2025 385th petroselo 376 149 9ms 29 Dec 2021 385th shibacho 🇯🇵 376 149 9ms 11 Nov 2022 387th amishtal 373 150 10ms 26 Dec 2019 387th jbjd 373 150 9ms 30 Jun 2024 389th jarekwg 371 151 9ms 9 May 2019 389th Haksell 🇦🇶 371 151 17ms 1 Dec 2019 389th karhuthebear 371 151 9ms 11 May 2022 389th LocNgu 371 151 9ms 21 Jul 2023 389th pde-bakk 🇳🇱 371 151 9ms 25 Oct 2023 389th lucasging 371 151 9ms 26 May 2025 389th 123mjb 371 151 9ms 5 Jun 2025 389th fuzzylojik-golf 🇺🇸 371 151 10ms 14 Jun 2025 397th rishavb123 368 152 10ms 19 Jul 2018 397th DaleNaci 368 152 9ms 19 Jul 2018 397th ngynkvn 368 152 9ms 27 Sep 2021 397th za3k 368 152 9ms 9 Oct 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