The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
√2 in all languages 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 800th qoqosz 705 68 12ms 6 Jun 2019 800th giacomogallina 705 68 11ms 6 Jun 2019 800th skps2010 705 68 11ms 14 Jun 2019 800th hoodadam 705 68 12ms 19 Jul 2019 800th dzhang314 705 68 12ms 14 Aug 2019 800th sk- 705 68 11ms 11 Sep 2019 800th handisb 705 68 12ms 2 Nov 2019 800th amishtal 705 68 12ms 27 Nov 2019 800th Haksell 🇦🇶 705 68 11ms 1 Dec 2019 800th Matistjati 705 68 12ms 3 Dec 2019 800th Daniel-Martin576 705 68 12ms 1 Apr 2020 800th Jviscus1 705 68 12ms 24 Apr 2020 800th GalladeGuy 🇺🇸 705 68 11ms 23 May 2020 800th aliakseikalosha 705 68 12ms 9 Jun 2020 800th Jumprocks1 705 68 12ms 11 Jun 2020 800th itiievskyi 🇺🇦 705 68 11ms 30 Jul 2020 800th dev-loop0 705 68 11ms 20 Aug 2020 800th linstr13 705 68 12ms 29 Sep 2020 800th mueller14003 705 68 12ms 8 Oct 2020 800th davidverweij 705 68 12ms 21 Oct 2020 800th martinsifrar 705 68 12ms 23 Oct 2020 800th Dazza314 🇬🇧 705 68 11ms 6 Nov 2020 800th austinrwarner 705 68 12ms 25 Dec 2020 800th Tess2662 705 68 12ms 11 Jan 2021 800th fynnkroeger 705 68 11ms 20 Jan 2021 800th ydevor 🇮🇱 705 68 12ms 22 Feb 2021 800th asadullayev 705 68 12ms 3 Mar 2021 800th orifu 705 68 11ms 19 Mar 2021 800th josephjojoe 705 68 12ms 19 Mar 2021 800th harrymwilkins 🇬🇧 705 68 12ms 18 Jul 2021 800th ngocbd 🇻🇳 705 68 12ms 31 Aug 2021 800th potato-jackson 705 68 12ms 6 Sep 2021 800th ToE42 705 68 11ms 7 Sep 2021 800th ehulinsky 🇺🇸 705 68 14ms 16 Sep 2021 800th redbeancola 705 68 12ms 11 Oct 2021 800th walterfeyman 705 68 12ms 30 Oct 2021 800th xy3 🇮🇪 705 68 12ms 18 Nov 2021 800th sleepyStick 705 68 12ms 7 Dec 2021 800th akshatj27 🇦🇶 705 68 12ms 11 Jan 2022 800th Bonjour27891 🇻🇳 705 68 11ms 10 Feb 2022 800th LeeCamp 705 68 12ms 15 Feb 2022 800th suwat513 705 68 11ms 23 Sep 2022 800th ValentinCassayre 705 68 12ms 9 Oct 2022 800th aksyristos 705 68 12ms 30 Oct 2022 800th Omega65536 🇩🇪 705 68 11ms 23 Nov 2022 800th jfallon1997 705 68 12ms 3 Jan 2023 800th Smoncko 705 68 12ms 1 Feb 2023 800th DragonaireM 705 68 12ms 6 Feb 2023 800th m3nt0ras 🇬🇷 705 68 12ms 16 Feb 2023 800th MiranDaniel 🇨🇿 705 68 11ms 29 Apr 2023 800th sd3b 705 68 11ms 1 May 2023 800th ZoeyKD 705 68 12ms 14 May 2023 800th Ripick 705 68 12ms 22 May 2023 800th msbranicky 705 68 12ms 10 Jul 2023 800th Stockoh 🇫🇷 705 68 12ms 5 Nov 2023 800th firegene 🇮🇪 705 68 11ms 24 Nov 2023 800th m42km 705 68 12ms 8 Dec 2023 800th epic-programmer-guy 705 68 11ms 17 Dec 2023 800th smokestacklightnin 🇺🇸 705 68 12ms 29 Dec 2023 800th Dataen 705 68 12ms 12 Jan 2024 800th scpchicken 🇵🇼 705 68 12ms 1 Feb 2024 800th Just4FunCoder 705 68 12ms 26 Feb 2024 800th sultan 705 68 11ms 9 Mar 2024 800th stertooy 🇧🇪 705 68 11ms 11 Jun 2024 800th codingisgreatbutiamnot 705 68 15ms 14 Jul 2024 800th voytxt 🇨🇿 705 68 12ms 13 Sep 2024 800th starfihs 705 68 12ms 26 Feb 2025 800th gigaprofisi 🇺🇸 705 68 11ms 2 Mar 2025 800th 0dyse 705 68 12ms 29 Apr 2025 800th codewrite 🇬🇧 705 68 12ms 7 May 2025 800th Voltrifrodec 🇸🇰 705 68 11ms 14 May 2025 800th JOrE-Softwares 705 68 12ms 21 May 2025 800th BenjaminHGong 705 68 12ms 23 May 2025 800th sainiayush 705 68 12ms 14 Jul 2025 800th GoldStar184 705 68 12ms 17 Jul 2025 800th cthierfelder 🇲🇨 705 68 12ms 7 Aug 2025 800th Upload-and-View 🇺🇦 705 68 12ms 9 Aug 2025 800th Andrey2001 705 68 12ms 7 days ago 879th lynn 705 225 239ms 4 Aug 2023 880th BrenSchaap 703 48 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