The Calendar hole will go live in approximately 8 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 715th cbondurant 740 65 12ms 6 Jul 2022 715th andre-de-lorde 740 65 24ms 9 Sep 2022 715th 5space 740 65 164ms 11 Sep 2022 715th trinityy-7 740 65 23ms 13 Sep 2023 715th yuchuehw 740 65 24ms 18 Jan 2024 715th dokutan 740 65 24ms 28 Feb 2024 715th xyangst 740 65 23ms 1 Oct 2024 715th JunkIce 740 65 24ms 13 Mar 2025 715th Flekay 🇩🇪 740 65 24ms 10 Jul 2025 715th ahmetdemirag 🇨🇾 740 65 23ms 30 Jul 2025 731st cywong-amino 🇭🇰 738 68 22ms 2 Jul 2020 731st tayloia 🇬🇧 738 68 24ms 15 May 2023 733rd MeWhenI 🇻🇦 738 103 524ms 28 Feb 2022 734th annaproxy 737 115 377ms 27 Oct 2023 735th WildTooth 735 85 707ms 10 Oct 2025 736th Herbert00709 🇵🇱 734 64 3,487ms 29 Oct 2024 737th Herbert00709 🇵🇱 734 141 83ms 25 Oct 2024 738th lynn 732 63 13ms 15 Nov 2021 739th Irratix 🇳🇱 732 81 125ms 1 Oct 2021 740th masflam 731 48 321ms 21 Jun 2024 741st primo-ppcg 🇹🇭 731 73 993ms 25 Nov 2021 741st anter69 🇭🇺 731 73 934ms 19 Apr 2024 743rd stefangimmillaro 731 116 430ms 18 Jul 2023 744th rucin93 🇵🇱 730 135 360ms 14 Nov 2025 745th kohlrabi 729 66 12ms 5 Feb 2020 745th stordev 729 66 69ms 26 Feb 2021 745th lmolteno 729 66 23ms 9 Mar 2021 745th dillon-duncando 729 66 23ms 6 Dec 2021 745th NDR0216 🇹🇼 729 66 23ms 13 Feb 2023 745th quimey 729 66 11ms 6 Mar 2023 745th ImpressedByRocks 729 66 10ms 24 May 2025 752nd jared-hughes 729 142 87ms 7 Feb 2023 753rd MeWhenI 🇻🇦 728 69 23ms 3 Aug 2024 754th GolfingSuccess 🇬🇷 728 815 621ms 10 Aug 2022 755th SirFireball3521 727 43 92ms 14 Feb 2023 756th Herbert00709 🇵🇱 727 63 388ms 13 May 2024 757th roguh 🇬🇹 726 59 5ms 26 Jan 2024 758th LS2021 725 117 415ms 24 Nov 2023 759th emgordon154 725 166 478ms 30 Apr 2025 760th emgordon154 724 124 100ms 13 days ago 761st CatsAreFluffy 723 82 117ms 7 Dec 2022 762nd urojony 🇵🇱 718 67 24ms 3 Jan 2021 762nd tetraxile 718 67 24ms 3 Oct 2021 762nd Nibamot 718 67 12ms 10 Dec 2021 762nd GeorgeStechman 🇬🇧 718 67 46ms 6 Jan 2024 762nd RandGuy 718 67 23ms 25 Jan 2024 762nd Ralac07 🇦🇺 718 67 23ms 16 Feb 2024 762nd inverseLorentz 🇦🇺 718 67 85ms 10 Apr 2024 762nd solisolu 718 67 50ms 9 Nov 2025 770th MeWhenI 🇻🇦 718 118 417ms 8 Dec 2022 771st dmrichwa 🇺🇸 717 70 23ms 19 Mar 2022 771st Naruyoko 717 70 71ms 13 Aug 2023 773rd dokutan 715 64 356ms 28 Feb 2024 774th Yewzir 🇧🇪 714 145 951ms 14 May 2024 775th BrenSchaap 712 48 38ms 12 Nov 2021 775th jared-hughes 712 48 47ms 20 Jan 2023 775th DialFrost 🇸🇬 712 48 74ms 27 Dec 2024 778th stefangimmillaro 711 190 127ms 4 Jun 2025 779th Schmitt-Very-Cool 710 88 459ms 3 Oct 2025 780th lynn 708 225 239ms 4 Aug 2023 781st markus-rekdal 707 68 23ms 31 May 2019 781st qoqosz 707 68 12ms 6 Jun 2019 781st giacomogallina 707 68 11ms 6 Jun 2019 781st skps2010 707 68 11ms 14 Jun 2019 781st hoodadam 707 68 12ms 19 Jul 2019 781st dzhang314 707 68 12ms 14 Aug 2019 781st sk- 707 68 11ms 11 Sep 2019 781st handisb 707 68 12ms 2 Nov 2019 781st amishtal 707 68 12ms 27 Nov 2019 781st Haksell 🇦🇶 707 68 11ms 1 Dec 2019 781st Matistjati 707 68 12ms 3 Dec 2019 781st yzhs 🇩🇪 707 68 11ms 19 Jan 2020 781st Daniel-Martin576 707 68 12ms 1 Apr 2020 781st Jviscus1 707 68 12ms 24 Apr 2020 781st GalladeGuy 🇺🇸 707 68 11ms 23 May 2020 781st aliakseikalosha 707 68 12ms 9 Jun 2020 781st Jumprocks1 707 68 12ms 11 Jun 2020 781st itiievskyi 🇺🇦 707 68 11ms 30 Jul 2020 781st dev-loop0 707 68 11ms 20 Aug 2020 781st 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