The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Pernicious Numbers 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 560th hymanimy 377 106 9ms 6 Jun 2021 560th VV1Git 377 106 16ms 28 Mar 2023 563rd Feniske 🇫🇷 374 107 9ms 7 Oct 2022 563rd tknight00 374 107 17ms 5 Mar 2024 563rd HanaEndUser 374 107 15ms 5 Mar 2024 566th lovernj 370 108 9ms 31 Jan 2022 566th yuchuehw 370 108 9ms 3 Jan 2024 568th KiwiKoder0123 367 109 12ms 23 Jun 2019 568th MiranDaniel 🇨🇿 367 109 9ms 29 Apr 2023 568th clayboll99 367 109 9ms 14 Jul 2025 571st Bananapants22 364 110 9ms 15 Aug 2022 572nd evanrittner 360 111 9ms 5 Jun 2021 572nd zwxzwxzwx21 360 111 9ms 30 Jan 2024 572nd BabySharkHi 360 111 16ms 22 Apr 2025 575th ElevatorShaft 357 112 12ms 18 Jun 2019 575th VictorFordham 357 112 9ms 9 Aug 2020 575th inishawl 357 112 9ms 16 Jun 2021 575th theunofficialcoder 357 112 9ms 2 Aug 2021 575th bwat2 357 112 9ms 6 Nov 2021 575th Pyro569 357 112 9ms 30 Jul 2023 575th kevdah 357 112 10ms 2 Oct 2023 575th TralfamadorianComedian 357 112 9ms 31 Dec 2024 583rd wilkij1 354 113 10ms 16 Jun 2018 583rd vonKrafft 354 113 10ms 25 Mar 2020 583rd qwjhvbxi 354 113 9ms 7 Feb 2024 583rd 123mjb 354 113 10ms 19 Nov 2025 587th mvrkws 351 114 9ms 5 Dec 2018 587th devRND-ess 351 114 9ms 29 Apr 2020 587th hamilton-bonds 351 114 10ms 24 Jul 2025 590th sleepyStick 348 115 9ms 2 Dec 2021 591st DaleNaci 345 116 10ms 27 Aug 2018 591st MariuszPienkosz 345 116 9ms 21 May 2020 591st SURAJMITTAL 345 116 9ms 20 Dec 2024 594th SimonPeatman 342 117 15ms 3 Feb 2019 594th odelo 342 117 9ms 26 Oct 2023 594th DGipe 342 117 9ms 2 Jul 2024 594th davidludwik2370 342 117 10ms 17 Sep 2025 598th BrenSchaap 339 118 9ms 20 Oct 2021 598th Azearia 339 118 9ms 27 Oct 2023 598th ComputerKWasTaken 🇺🇸 339 118 15ms 1 Jun 2024 601st fepe55 333 120 10ms 11 Oct 2018 601st azure-blondon 333 120 9ms 14 Dec 2023 603rd sli-Lut 331 121 9ms 26 Oct 2023 604th nmgetahun 328 122 9ms 9 Dec 2022 604th TheLazySquid 328 122 9ms 21 Dec 2022 606th jlevis10 325 123 9ms 26 Oct 2023 606th GolfGPT 325 123 17ms 19 Nov 2023 608th ian-h-chamberlain 🇺🇸 323 124 9ms 27 Dec 2019 609th zuparnowa 320 125 15ms 25 Jan 2019 609th henrytranter 320 125 15ms 20 Sep 2019 609th itljan30 320 125 10ms 2 Sep 2024 612th j21marshall 317 126 9ms 7 Aug 2020 612th goGuru 317 126 9ms 21 Dec 2022 612th EnisEfe0 317 126 10ms 18 May 2025 615th usnheckler 315 127 19ms 8 Jun 2019 616th dylanjones92 294 136 9ms 25 Jan 2024 617th SnehanjanChatterjee 282 142 9ms 20 Dec 2018 617th KatieLG-Transpiler 🇬🇧 282 142 10ms 23 Jun 2022 617th zt14427 282 142 9ms 12 Aug 2023 620th breeezi 280 143 10ms 7 Feb 2020 620th eddvrs 280 143 16ms 22 Dec 2023 620th alfonsoalves 280 143 10ms 27 Feb 2024 623rd dddthedark 265 151 9ms 14 Mar 2018 623rd PYRiTEmonark 265 151 9ms 22 May 2021 625th hardlyBearable 261 153 9ms 20 May 2019 625th janga1 261 153 9ms 17 Aug 2021 627th dcure73 256 156 9ms 7 Jun 2019 628th markbyrne 250 160 10ms 26 Oct 2020 629th kevinnaviapaiva 248 161 10ms 5 Mar 2025 630th CyberTapir 245 163 9ms 3 Sep 2024 631st DrPrettyman 237 169 10ms 18 Jul 2023 632nd UriyaBA 233 172 9ms 20 Mar 2023 633rd newc0m 225 178 9ms 11 Dec 2018 634th my-company-my 🇲🇽 222 180 9ms 7 Apr 2025 635th Unknownuserfrommars 206 194 9ms 21 Nov 2024 636th Parapet128 205 195 11ms 16 Jan 2019 637th kurkale6ka 201 199 9ms 2 Jan 2024 638th jjbvtk 198 202 9ms 2 Sep 2021 639th Noooiz 194 206 9ms 30 Dec 2018 640th eje24 192 208 10ms 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