The Calendar hole will go live in approximately 4 days. Why not try and solve it ahead of time?
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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 877th moustave 586 100 14ms 19 Nov 2024 877th TheZwierzLF 🇵🇱 586 100 10ms 25 May 2025 877th jtaxen 586 100 11ms 15 Oct 2025 884th JGDoerrer 586 206 157ms 14 Jan 2022 885th GeorgeStechman 🇬🇧 585 99 9ms 18 Nov 2022 885th Ultra814 585 99 9ms 29 Nov 2025 887th Axsag 🇫🇷 584 120 6ms 28 Jul 2021 887th me42th 584 120 5ms 16 Jun 2025 889th msbranicky 583 164 2ms 28 Sep 2023 890th m-tkach 🇺🇦 583 180 27ms 5 May 2025 891st didion0 🇺🇸 583 259 2ms 30 Apr 2021 892nd rvdnieuwendijk 🇳🇱 582 94 231ms 27 Dec 2020 893rd ehulinsky 🇺🇸 580 101 11ms 10 Nov 2021 893rd commandblockguy 🇺🇸 580 101 14ms 17 Nov 2023 893rd hellwue 580 101 11ms 21 Jun 2024 893rd hiichbindermax 580 101 10ms 21 Jun 2024 893rd souta-1326 580 101 15ms 1 Apr 2025 898th DaCuteRaccoon 579 59 136ms 23 Apr 2022 899th commandblockguy 🇺🇸 579 96 386ms 1 Sep 2025 900th razetime 579 121 6ms 24 Jan 2022 900th MeWhenI 🇻🇦 579 121 5ms 28 May 2023 902nd bac0id 578 154 348ms 30 Jun 2024 903rd jared-hughes 578 175 2,524ms 24 Jun 2022 903rd janbehrens 🇩🇪 578 175 2,569ms 20 Nov 2022 905th HumanoidCPU 578 180 493ms 8 Nov 2025 906th MeWhenI 🇻🇦 576 234 57ms 13 Jul 2021 907th AkashTandon167 575 102 11ms 2 Dec 2020 907th abba23 575 102 10ms 13 Jun 2021 907th olavaga 575 102 10ms 15 Aug 2021 907th Anonymousellama21 575 102 14ms 15 Jun 2022 907th Mikey-Beep 🇬🇧 575 102 12ms 17 Jun 2022 907th grave367 575 102 11ms 5 Mar 2023 907th msbranicky 575 102 12ms 10 Aug 2023 907th m42km 575 102 13ms 25 Nov 2023 907th eddvrs 575 102 10ms 22 Dec 2023 907th sultan 575 102 10ms 5 Mar 2024 907th Languag3 575 102 9ms 9 Oct 2024 907th KasperKivimaeki 🇫🇮 575 102 10ms 10 Jul 2025 919th pandapawskat 575 130 1ms 1 Dec 2020 919th Lydxn 🇨🇦 575 130 1ms 4 Dec 2020 921st janbehrens 🇩🇪 574 148 481ms 24 Mar 2022 922nd AnnoyedArt1256 573 101 9ms 11 Jan 2022 923rd boboquack 573 183 27ms 30 Dec 2023 924th hrubymar10 573 209 261ms 21 Feb 2024 925th msbranicky 572 211 156ms 23 Sep 2023 926th gastropner 571 131 2ms 7 Jul 2025 927th NewDefectus 🇮🇱 569 103 13ms 18 Dec 2020 927th Indivicivet 569 103 10ms 16 Mar 2021 927th rowechenzhong 569 103 10ms 27 Nov 2021 927th CedricGebistorf 569 103 11ms 6 Mar 2022 927th trist224 🇫🇷 569 103 12ms 1 Sep 2022 927th betaveros 569 103 10ms 31 Dec 2022 927th klixel 🇨🇦 569 103 10ms 28 Mar 2025 927th Matter1024 🇮🇳 569 103 10ms 2 Jul 2025 927th redweasel 569 103 10ms 24 Jul 2025 936th tomh1012 567 157 376ms 21 Nov 2021 937th MeWhenI 🇻🇦 566 87 16ms 3 Jun 2023 938th Waffle3z 566 533 4ms 31 Jan 2021 939th MeWhenI 🇻🇦 565 150 135ms 17 Nov 2022 940th ArmaanAS 564 104 15ms 26 Mar 2021 940th neihousaigaai 564 104 10ms 28 Mar 2021 940th Eilonlif 🇮🇱 564 104 11ms 11 Sep 2022 940th fbe 564 104 10ms 18 Oct 2023 940th jatloe 564 104 11ms 9 Sep 2024 945th varhammer 🇷🇺 564 177 10ms 18 Jan 2022 946th Ernest1338 564 214 165ms 14 Jan 2022 947th janbehrens 🇩🇪 563 158 334ms 21 Nov 2021 947th hamhub7 563 158 345ms 4 Aug 2022 949th tomh1012 562 103 9ms 2 Dec 2020 950th eMGeeneer 562 185 410ms 20 Sep 2025 951st emgordon154 562 267 1,737ms 10 Feb 2025 952nd m42km 561 99 365ms 4 Feb 2024 952nd Kacarott 🇦🇺 561 99 376ms 10 Sep 2024 954th alexhuntley 561 178 9ms 11 Apr 2021 955th bastienvoirin 🇫🇷 558 105 16ms 5 Dec 2020 955th ejini6969 558 105 10ms 1 Apr 2023 955th stertooy 🇧🇪 558 105 9ms 14 Jun 2024 955th bnic24 558 105 9ms 31 Jul 2024 955th InigoK 🇺🇸 558 105 11ms 21 Aug 2025 960th SirBogman 🇺🇸 558 367 11ms 23 Nov 2022 First Prev 881–960 of 2,023 Next Last
