The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
All holes in C# 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 Holes Points Chars Submitted 718th WatchThisNow 1 698 106 1 Aug 2024 722nd adoxography 1 692 91 20 Jan 2022 723rd aksyristos 2 691 945 18 Oct 2024 724th phpboyscout 1 689 74 27 Apr 2023 724th azure-blondon 1 689 74 5 May 2024 726th Chesium 1 689 106 21 Nov 2021 726th doge1338 1 689 106 21 Nov 2021 728th MarcoCasadei 1 685 92 11 Aug 2022 729th katsanos 1 685 108 21 Nov 2021 729th celiendonze 🇨🇭 1 685 108 11 Jul 2023 729th Amheus 1 685 108 7 Oct 2023 732nd InigoK 🇺🇸 2 685 1,149 12 Apr 2023 733rd Mukundan314 1 684 244 1 Jul 2025 734th Telrik 1 683 104 24 May 2023 735th james0x0A 1 680 150 30 Oct 2024 736th AgentIvan 🇺🇦 1 679 109 21 Nov 2021 736th kkerchmar 1 679 109 21 Nov 2021 738th backupGitProfile 2 678 1,009 21 Nov 2021 739th Joe-V2 2 673 874 19 Apr 2022 740th Bodo171 1 672 122 6 Dec 2022 741st Larsen2328 1 667 111 21 Nov 2021 742nd tdashroy 1 667 264 21 Nov 2021 743rd DmytroLynda 2 664 644 21 Nov 2024 744th AAltemus 2 662 756 21 Nov 2021 745th anaerobic 1 661 112 21 Nov 2021 746th bearandhammer 1 655 113 16 May 2020 746th samstalhandske 1 655 113 15 Sep 2022 748th xenix1337 1 654 81 28 Nov 2021 749th LHLaurini 🇧🇷 2 654 763 13 Jul 2024 750th kaedepol 1 650 100 30 Oct 2023 751st Jopie64 1 649 114 12 May 2020 751st aidankco 1 649 114 23 Jun 2022 751st ansi0 1 649 114 5 May 2023 754th louisoftokyo 2 645 1,031 13 Oct 2025 755th singlekeycap 1 643 115 21 Oct 2022 755th TheCod-r 🇦🇶 1 643 115 20 Jul 2023 755th hrubymar10 1 643 115 11 Feb 2024 758th ComputerKWasTaken 🇺🇸 1 641 128 14 Apr 2025 759th rholliday 1 638 116 21 Nov 2021 760th joshmoody24 1 635 126 3 Dec 2022 761st Athight 1 635 137 21 Nov 2021 762nd ArturLukianov 1 632 117 21 Nov 2021 762nd gnlow 🇰🇷 1 632 117 21 Nov 2021 762nd r-borowski 1 632 117 21 Nov 2021 762nd silvncr 1 632 117 21 Nov 2021 766th Skwerl23 1 631 84 5 Feb 2023 766th QzLP2P 1 631 84 29 Mar 2024 768th RobertTheBastian 1 627 118 21 Nov 2021 768th Snidden 1 627 118 21 Nov 2021 768th StefanoFiumara 1 627 118 21 Nov 2021 771st YourSenseiCreeper 2 623 569 2 Dec 2023 772nd lilyyy411 1 622 82 21 Nov 2021 773rd testtagg 1 622 119 21 Nov 2021 773rd bwenstar 1 622 119 11 Aug 2022 773rd SebiPanther 1 622 119 12 Nov 2022 776th MHunter-NZ 🇳🇿 1 621 140 21 Nov 2021 777th 00anwi 1 619 118 4 Dec 2022 778th AllisonTowers 1 617 120 13 Apr 2022 779th logvp 1 616 292 12 Jan 2024 780th louisbosqui 1 612 121 21 Nov 2021 780th salcosser 1 612 121 25 Aug 2023 782nd JTrainor11 1 606 104 1 Nov 2024 783rd PaulMWeiser 1 602 88 27 Feb 2023 784th Lizard314 1 600 85 21 Nov 2021 785th Timwi 1 600 418 4 Dec 2024 786th khaidigidinos 1 594 106 22 Jun 2023 787th arctouch-nilobasilio 1 592 125 9 Nov 2022 788th GulgDev 1 592 147 22 Mar 2023 789th emmertgergo 1 591 132 27 Apr 2023 790th Narik1 1 588 216 3 Apr 2023 791st tatsu011 2 587 1,164 21 Nov 2021 792nd Rambso 1 586 87 28 Mar 2025 793rd FEZfan 🇦🇺 1 583 127 27 May 2025 794th PotatoSaladOverlord 1 578 128 19 Jan 2024 795th neocccro 2 577 1,797 23 Mar 2023 796th mihaits 1 573 89 21 Nov 2021 797th Arasfon 1 569 130 21 Nov 2021 798th Jvardas 1 565 154 21 Nov 2021 799th Mituzsuki 2 562 1,216 21 Nov 2021 800th russlescai 1 561 321 21 Nov 2021 First Prev 721–800 of 1,018 Next Last