The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
√2 in all languages 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 879th iczelia 🇩🇪 707 71 20ms 10 Oct 2025 882nd LHLaurini 🇧🇷 706 84 119ms 5 Jul 2024 883rd JunkIce 704 65 364ms 13 Mar 2025 884th ovs-code 🇩🇪 703 104 99ms 13 Oct 2022 884th MeWhenI 🇻🇦 703 104 161ms 14 Oct 2022 886th retrohun 702 846 32ms 4 Jan 2023 887th yzhs 🇩🇪 701 50 163ms 21 Jun 2022 887th Andriamanitra 🇫🇮 701 50 168ms 23 Sep 2022 889th jmhowl 697 69 11ms 19 Jan 2020 889th cmdrsabre 697 69 11ms 30 Jan 2020 889th artyom-razinov 697 69 12ms 13 Feb 2020 889th HemangRajvanshy 697 69 12ms 1 Apr 2020 889th msrawson 697 69 12ms 14 May 2020 889th PyPylia 🇦🇺 697 69 11ms 7 Aug 2020 889th billylanchantin 697 69 12ms 23 Aug 2020 889th magnickolas 697 69 13ms 29 Aug 2020 889th WillowBee7 697 69 11ms 28 Sep 2020 889th ralsei 697 69 11ms 6 Oct 2020 889th jdrouvin 697 69 12ms 2 Dec 2020 889th befoster 697 69 9ms 10 Apr 2021 889th StHagel 697 69 12ms 7 May 2021 889th 8Bit1Byte 697 69 12ms 20 Jun 2021 889th Fmbalbuena 697 69 12ms 17 Sep 2021 889th Ted-Barrett 🇦🇺 697 69 11ms 29 Sep 2021 889th forlack 697 69 11ms 8 Nov 2021 889th shibacho 🇯🇵 697 69 12ms 27 Nov 2021 889th pecholsjones 697 69 12ms 12 Dec 2021 889th CuboidRaptor 🇨🇦 697 69 12ms 3 Apr 2022 889th MakkCH 697 69 11ms 24 Apr 2022 889th CarsonChr 🇺🇸 697 69 12ms 18 Sep 2022 889th bonevbs 697 69 12ms 20 Nov 2022 889th KevinLyvers 697 69 12ms 13 Dec 2022 889th jtaxen 697 69 12ms 4 Jan 2023 889th SucukMitEi 697 69 12ms 7 Jan 2023 889th atazzam 🇺🇸 697 69 12ms 5 Mar 2023 889th DrPiranoid 697 69 12ms 26 Mar 2023 889th Hortaros 697 69 11ms 15 Apr 2023 889th willdaspit 697 69 11ms 4 Aug 2023 889th XioR112 🇵🇱 697 69 13ms 29 Aug 2023 889th jameswmccarty 697 69 12ms 6 Jun 2024 889th dtbao20 🇻🇳 697 69 12ms 8 Oct 2024 889th sciencedjinn 697 69 12ms 8 Nov 2024 889th Unknownuserfrommars 697 69 13ms 21 Nov 2024 889th yokasuretsu 697 69 9ms 31 Dec 2024 889th clayboll99 697 69 12ms 10 Jul 2025 889th webmiche 697 69 12ms 3 Nov 2025 927th janbehrens 🇩🇪 697 72 41ms 30 Dec 2023 927th emgordon154 697 72 78ms 4 Aug 2024 929th annaproxy 695 49 80ms 27 Aug 2022 929th croc54 695 49 36ms 10 Dec 2024 931st SmartK8 🇨🇿 695 122 421ms 1 Nov 2022 931st tomh1012 695 122 403ms 8 Sep 2025 933rd duckyluuk 🇳🇱 694 90 493ms 25 Sep 2025 934th yzhs 🇩🇪 690 86 114ms 24 Jul 2021 934th strout 690 86 106ms 26 Aug 2022 936th petar-donchev 687 70 46ms 1 Sep 2019 936th cubed-guy 687 70 53ms 20 Sep 2021 936th kenny14231 687 70 11ms 9 Oct 2021 936th GioacchinoGT02 687 70 12ms 3 Dec 2024 940th m-tkach 🇺🇦 687 259 60ms 27 Jun 2022 941st juliansiebert 🇩🇪 686 68 241ms 3 Aug 2022 942nd MeWhenI 🇻🇦 686 232 41ms 6 Jun 2023 943rd Shanethegamer 🇺🇸 685 111 478ms 5 Mar 2022 944th aliakseikalosha 684 124 480ms 17 Oct 2024 944th Soyo-Wind 684 124 417ms 6 Nov 2025 946th Steffan153 🇫🇮 679 52 41ms 29 Aug 2024 947th primo-ppcg 🇹🇭 679 196 2,158ms 3 Feb 2022 948th teddyward 678 71 12ms 9 Jan 2021 948th xkacer 🇨🇿 678 71 12ms 25 Jan 2021 948th sadfun 678 71 12ms 29 Jan 2021 948th ArmaanAS 678 71 9ms 24 Mar 2021 948th classAndrew 678 71 12ms 1 Aug 2021 948th SpareManiKatti 678 71 9ms 10 Sep 2021 948th JGDoerrer 678 71 11ms 22 Jan 2022 948th lovernj 678 71 12ms 7 Feb 2022 948th elephantpanda 678 71 9ms 31 Aug 2022 948th sandorstormen 678 71 12ms 25 Nov 2022 948th Vinterion 678 71 11ms 24 Jul 2023 948th sulphemi 678 71 12ms 5 Oct 2023 948th davidsaltacc 678 71 12ms 16 Nov 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