The Calendar hole will go live in approximately 26 hours. 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 473rd mm1013g 353 190 9ms 6 Sep 2024 473rd ComputerKWasTaken 🇺🇸 353 190 10ms 8 May 2025 473rd EthanJantz 353 190 16ms 5 Sep 2025 484th MLPdiscord 351 191 10ms 22 Jan 2022 485th WilliamBate 347 193 9ms 18 Aug 2020 485th evanrittner 347 193 10ms 26 Feb 2021 485th ztuned 347 193 10ms 26 Jul 2023 485th te-chnical 347 193 10ms 6 May 2025 489th Demonarchet 342 196 10ms 18 Apr 2023 489th Chimplement 342 196 12ms 13 Dec 2023 491st og2701 340 197 10ms 14 May 2021 491st ethandhunt 340 197 10ms 16 Aug 2021 493rd Akilles1 337 199 10ms 20 Nov 2024 494th jakekaplan 335 200 16ms 15 Mar 2019 495th CRHillman 333 201 11ms 15 Sep 2020 496th akshatj27 🇦🇶 332 202 10ms 11 Jan 2022 497th CheeseCake628 🇳🇴 328 204 17ms 15 Nov 2024 498th mrmena 🇦🇺 327 205 10ms 29 Jun 2021 499th petar-donchev 324 207 9ms 8 Sep 2019 500th tomh1012 319 210 17ms 29 Oct 2020 501st besasam 318 211 10ms 31 Mar 2021 502nd PaulBadour 316 212 9ms 29 Oct 2023 503rd zuparnowa 315 213 9ms 28 Jan 2019 503rd henrytranter 315 213 10ms 20 Sep 2019 503rd KiwiLT 315 213 10ms 16 Nov 2022 506th Bit125 313 214 11ms 31 Jan 2024 507th XaXa1234 312 215 9ms 23 Apr 2020 507th JuniorKlump 312 215 9ms 15 Sep 2025 509th hotmanga 306 219 9ms 6 Nov 2023 510th atazzam 🇺🇸 303 221 9ms 3 Sep 2022 511th jamespeilunli 302 222 9ms 29 Dec 2021 512th vonKrafft 300 223 9ms 25 Mar 2020 513th tasuren 299 224 23ms 8 Jan 2021 514th elteammate 296 226 10ms 7 Jul 2020 515th thomashastings 295 227 11ms 15 Apr 2021 516th Florian-Mt 289 232 10ms 15 Mar 2024 517th Ccuredalerayner 288 233 9ms 14 May 2021 518th AforAmpere 285 235 11ms 3 May 2020 519th tkjn 280 239 9ms 8 Nov 2023 519th OSYCh314 🇦🇺 280 239 9ms 7 Nov 2024 521st egelmex 276 243 9ms 15 Nov 2019 521st NoneTheFewer 276 243 11ms 3 days ago 523rd hjcafaroUC 272 246 10ms 12 Jun 2021 524th TJK-S 271 247 9ms 27 days ago 525th craftablescience 265 253 10ms 25 Apr 2022 526th DihydrogenMonoxideH2O 263 255 9ms 23 Jan 2025 527th cingulataluke 257 261 10ms 26 Aug 2023 528th newc0m 250 268 9ms 8 Apr 2019 529th SURAJMITTAL 248 270 10ms 17 Dec 2024 530th luttermann 246 272 10ms 9 Aug 2019 531st kevinnaviapaiva 245 274 11ms 14 Feb 2025 532nd twocatsinatrenchcoat 241 278 10ms 12 May 2022 533rd justpic1 240 279 10ms 13 Mar 2023 533rd Mch47 240 279 9ms 29 Oct 2023 535th dcure73 239 280 9ms 7 Jun 2019 536th ineedcookie 238 281 10ms 1 May 2024 537th YoungjuneKwon 236 284 10ms 22 Jan 2019 538th JKfromHMS 233 288 10ms 30 Apr 2024 539th r-benson 🇬🇧 230 291 10ms 30 Jan 2023 540th kpasc 228 294 9ms 14 Jul 2018 541st MatanAvitan 227 295 10ms 18 Feb 2020 541st StoverGitHub 227 295 10ms 16 Jun 2022 541st cseiter 227 295 9ms 6 Dec 2022 544th UltimateGuy0987 220 305 11ms 8 Nov 2022 544th shanerey6 220 305 9ms 4 Oct 2023 546th mothcolada 🇺🇸 207 324 9ms 15 Dec 2020 547th jjbvtk 206 325 9ms 27 Sep 2021 548th jgermain48 206 326 9ms 25 Apr 2020 549th JOrE20 🇺🇸 204 329 9ms 1 Dec 2025 550th Zhenyu-Bo 198 338 9ms 31 Jul 2025 551st codefeld 198 339 9ms 27 Feb 2023 552nd LukasFolwarczny 🇨🇿 197 340 11ms 17 Sep 2022 553rd ldoodle 195 344 10ms 6 Oct 2022 554th parkerscheon 190 352 11ms 24 Nov 2020 555th confusedjpg 180 372 10ms 31 Mar 2024 556th twrogers1 179 375 10ms 27 Aug 2020 557th luca1339 176 380 10ms 30 Apr 2024 558th lukasmoellerch 175 382 10ms 14 Jan 2019 559th valgardg 🇮🇸 166 403 10ms 8 Sep 2022 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