The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
United States in C# 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 1st namelessiw 1,000 113 461ms 4 Sep 2025 2nd JayXon 🇺🇸 974 116 395ms 6 Sep 2025 3rd AdrienHache 🇫🇷 876 129 416ms 28 Aug 2025 4th nwellnhof 🇩🇪 813 139 408ms 27 Jun 2023 5th SirBogman 🇺🇸 785 144 391ms 24 Jan 2025 6th tomtheisen 🇺🇸 720 157 425ms 11 Feb 2025 7th primo-ppcg 🇹🇭 711 159 441ms 7 Jul 2022 8th Gaddy 🇫🇷 706 160 380ms 17 May 2022 9th c0d3-4-F00d 🇩🇪 702 161 368ms 4 Jul 2023 10th ccolella-mdc 698 162 411ms 13 Oct 2023 11th billings7 🇬🇧 689 164 355ms 21 Nov 2021 11th Yax42 🇫🇷 689 164 443ms 20 Jan 2025 13th aliakseikalosha 685 165 373ms 6 Sep 2023 14th CaedenHarper 🇨🇦 677 167 411ms 16 Oct 2025 15th stefangimmillaro 669 169 359ms 26 Sep 2023 16th arctouch-cristiannevianna 665 170 400ms 3 Jul 2023 17th m-tkach 🇺🇦 657 172 369ms 31 Jul 2022 18th janbehrens 🇩🇪 642 176 367ms 16 Jul 2022 19th KatieLG 🇬🇧 631 179 406ms 28 Apr 2024 20th annaproxy 554 204 457ms 19 May 2023 21st MeWhenI 🇻🇦 538 210 392ms 11 Oct 2023 22nd dokutan 507 223 357ms 11 Feb 2025 23rd yzhs 🇩🇪 477 237 371ms 3 Jul 2022 24th ericlangedijk 🇸🇮 436 259 407ms 23 May 2023 25th iznax 431 262 384ms 21 Nov 2021 26th tomh1012 401 282 444ms 20 days ago 27th juliansiebert 🇩🇪 387 292 356ms 17 Jan 2023 28th codewrite 🇬🇧 351 322 426ms 5 Jul 2025 29th arcpolaris 316 358 441ms 9 Nov 2025 30th dpethes 301 375 395ms 16 Jul 2022 31st postie77 255 443 429ms 5 Jul 2023 32nd renthist 245 462 405ms 30 Jan 2022 33rd DanMilner 198 572 429ms 21 Nov 2021 34th Meowsan91 🇨🇿 161 700 388ms 21 Nov 2021 35th ChrisTheisen 151 746 404ms 14 Dec 2022 36th louisoftokyo 136 833 414ms 13 Oct 2025 37th SFerguson123 120 945 464ms 13 Oct 2023 38th JarrodCope 107 1,056 400ms 11 Apr 2024 39th DevAndersen 106 1,070 399ms 21 Nov 2021 40th jstein-praxis 104 1,087 405ms 21 Nov 2021 41st KatieLG-Transpiler 🇬🇧 91 1,237 403ms 4 Jul 2022 42nd Adix-null 🇱🇹 39 2,899 473ms 4 Jul 2023 1–42 of 42
