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 397th tpremoli 368 152 10ms 9 Jul 2025 402nd l-donovan 366 153 9ms 31 Jan 2024 402nd croc54 366 153 9ms 30 Dec 2024 404th ly0va 364 154 9ms 8 Jan 2019 404th DarkTemplar5 364 154 10ms 10 Oct 2020 404th hellwue 364 154 11ms 1 Mar 2022 404th BerkeAltiparmak 364 154 11ms 22 May 2022 404th sultan 364 154 10ms 6 Jun 2022 404th Anananas42 364 154 9ms 6 Aug 2022 404th JesseNoEyes 🇺🇸 364 154 9ms 24 Nov 2024 411th resoNathan 361 155 10ms 3 May 2024 412th MathieuIko 359 156 10ms 20 Feb 2022 412th ThatAlo 359 156 9ms 20 May 2023 412th cingulataluke 359 156 10ms 26 Aug 2023 415th adesanjo 357 157 9ms 24 Oct 2019 415th 4ndyJ 🇬🇧 357 157 10ms 15 Nov 2024 417th hymanimy 354 158 9ms 28 Jul 2021 417th dillon-duncando 354 158 9ms 5 Oct 2022 417th n0es 354 158 13ms 12 Oct 2022 417th bobbysq 354 158 12ms 30 Jun 2023 417th codingisgreatbutiamnot 354 158 10ms 7 Aug 2024 422nd kyleclaassen 352 159 10ms 12 Mar 2022 422nd Ripick 352 159 10ms 6 May 2023 422nd jmatko 352 159 10ms 28 Oct 2023 425th CutSandstone 348 161 10ms 5 Jul 2024 425th LordSir101 348 161 9ms 16 Aug 2025 427th mjecke 346 162 9ms 3 Jul 2023 428th nulzo 344 163 10ms 17 Oct 2025 429th xbxbxb007 341 164 9ms 10 Jan 2024 429th azure-blondon 341 164 10ms 10 Feb 2024 429th psaban 341 164 9ms 31 Jul 2025 432nd sli-Lut 339 165 9ms 27 Oct 2023 433rd j21marshall 337 166 10ms 7 Aug 2020 433rd kronosgreen 337 166 9ms 17 Jul 2023 435th xkacer 🇨🇿 335 167 9ms 31 Jan 2021 435th tston529 335 167 9ms 25 Feb 2022 435th Fanrco 335 167 10ms 31 Aug 2023 438th oAsAo 333 168 10ms 20 Jan 2020 438th eshilo-draper 333 168 9ms 7 Oct 2022 438th Ythaenagor 333 168 10ms 5 Aug 2024 441st ABC00012345 331 169 10ms 2 May 2024 442nd b4dpxl 329 170 10ms 11 Nov 2021 442nd andrewgopher 329 170 10ms 27 Jun 2022 444th pavi2410 327 171 9ms 26 Aug 2020 445th hyvyys 324 173 10ms 13 Sep 2020 445th johnnythedoggie 324 173 10ms 29 Apr 2021 445th qwjhvbxi 324 173 9ms 5 Feb 2024 448th jydiw 322 174 9ms 14 Dec 2019 448th benradclyffe 322 174 11ms 15 May 2023 448th kbeat 🇰🇿 322 174 10ms 21 May 2025 451st jazzcurio 320 175 10ms 24 Jul 2024 451st tejapvk 320 175 9ms 18 Jun 2025 451st TheZwierzLF 🇵🇱 320 175 9ms 27 days ago 454th hiichbindermax 318 176 9ms 12 Feb 2025 455th DrPrettyman 316 177 10ms 26 Jun 2023 456th DrJoWe 315 178 10ms 30 Apr 2024 457th kypi 313 179 9ms 21 Feb 2020 457th Mikey-Beep 🇬🇧 313 179 10ms 1 Jul 2022 457th Upload-and-View 🇺🇦 313 179 9ms 16 Aug 2025 460th raywinray 311 180 9ms 28 Sep 2018 460th bastienvoirin 🇫🇷 311 180 10ms 4 Apr 2020 460th goGuru 311 180 9ms 14 Dec 2022 460th LuisGoncalves05 🇵🇹 311 180 10ms 9 Jul 2025 460th CoolBvll 311 180 10ms 10 Jul 2025 465th PotatoSaladOverlord 308 182 9ms 19 Jan 2024 465th GitQuick 308 182 9ms 11 Mar 2024 467th estomagordo 🇳🇱 304 184 9ms 3 Aug 2019 468th GioacchinoGT02 303 185 9ms 3 Dec 2024 469th dylanjones92 301 186 9ms 29 Jan 2024 470th HassanAliKadhem 🇧🇭 299 187 9ms 14 Jan 2022 470th trist224 🇫🇷 299 187 12ms 27 Sep 2022 470th Zach10za 299 187 10ms 2 Dec 2022 473rd ADV1K 🇮🇳 298 188 10ms 25 Oct 2021 473rd Bananapants22 298 188 9ms 27 Aug 2022 475th MarshalX 🇵🇱 296 189 10ms 14 Nov 2024 476th ShootingStar91 295 190 9ms 28 May 2019 476th kenballus 295 190 9ms 17 Aug 2022 476th Ayush-Agarwal07 295 190 10ms 5 Sep 2023 476th erikgaal 295 190 10ms 13 Oct 2023 476th pricemat 295 190 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