The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
τ 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 401st namelessiw 836 72 400ms 5 Mar 2024 402nd SirBogman 🇺🇸 836 120 12ms 7 Jul 2023 403rd jslip 834 59 14ms 25 May 2022 403rd ovs-code 🇩🇪 834 59 18ms 11 Mar 2023 403rd Steffan153 🇫🇮 834 59 15ms 12 Mar 2023 403rd xsot 🇸🇬 834 59 11ms 6 Oct 2024 407th fuzzylojik-golf 🇺🇸 833 145 665ms 24 Sep 2025 407th DialFrost 🇸🇬 833 145 550ms 25 Sep 2025 409th marcin7Cd 832 76 15ms 4 Feb 2021 409th namelessiw 832 76 18ms 3 Dec 2023 409th andrewjc2000 832 76 13ms 21 Mar 2025 409th solisolu 832 76 25ms 16 Nov 2025 409th YAJUE114514 832 76 11ms 14 days ago 414th namelessiw 832 120 403ms 22 Jul 2025 415th jared-hughes 832 142 76ms 7 Feb 2023 416th emplv 🇱🇻 831 114 108ms 2 Jan 2023 417th ovs-code 🇩🇪 831 118 2,681ms 16 Aug 2023 418th Andriamanitra 🇫🇮 829 47 172ms 23 Sep 2022 418th neel11235813 829 47 205ms 14 Feb 2023 418th voytxt 🇨🇿 829 47 2,121ms 22 May 2023 418th Lv0Sys 🇵🇱 829 47 188ms 26 days ago 422nd GrayJoKing 🇦🇺 829 143 68ms 2 Feb 2024 423rd Herbert00709 🇵🇱 827 39 58ms 5 May 2024 424th primo-ppcg 🇹🇭 827 49 56ms 5 Oct 2020 424th ovs-code 🇩🇪 827 49 80ms 22 Oct 2023 426th DialFrost 🇸🇬 825 73 458ms 15 Jan 2024 427th Shanethegamer 🇺🇸 824 115 115ms 14 Oct 2022 428th Steffan153 🇫🇮 823 74 98ms 10 Feb 2024 429th nwellnhof 🇩🇪 823 122 10ms 5 May 2020 429th sean-niemann 🇺🇸 823 122 23ms 25 Jun 2025 429th jared-hughes 823 122 33ms 23 Sep 2025 432nd sean-niemann 🇺🇸 822 147 525ms 25 Sep 2025 433rd emgordon154 821 72 126ms 15 Nov 2024 434th LogicalJoe 821 77 18ms 10 Nov 2022 434th stefangimmillaro 821 77 10ms 19 Dec 2022 434th snydej 821 77 12ms 3 Dec 2024 434th moustave 821 77 10ms 14 Mar 2025 434th jatloe 821 77 10ms 17 Mar 2025 439th SirBogman 🇺🇸 820 144 63ms 27 May 2023 440th stefangimmillaro 818 122 405ms 1 Aug 2023 440th CaedenHarper 🇨🇦 818 122 371ms 21 Oct 2025 442nd AlephSquirrel 817 73 10ms 10 Feb 2023 442nd KingSkyrock 🇺🇸 817 73 10ms 14 Oct 2024 444th SirBogman 🇺🇸 816 55 1,186ms 26 Oct 2021 445th rhdqor213 816 123 21ms 27 Jun 2024 446th DialFrost 🇸🇬 815 94 76ms 23 Mar 2025 447th nwellnhof 🇩🇪 811 62 294ms 1 Nov 2021 447th SirBogman 🇺🇸 811 62 360ms 11 Aug 2023 449th rifatx 811 123 423ms 14 Jul 2024 450th nwellnhof 🇩🇪 810 50 71ms 1 May 2020 451st RaBa21 🇭🇺 810 78 12ms 19 Jul 2025 451st snoozingnewt 🇨🇦 810 78 11ms 21 Nov 2025 453rd MeWhenI 🇻🇦 810 117 106ms 15 Oct 2022 454th GrayJoKing 🇦🇺 809 124 29ms 19 Jun 2024 454th ovs-code 🇩🇪 809 124 14ms 16 days ago 456th MeWhenI 🇻🇦 809 178 273ms 9 Feb 2023 457th billings7 🇬🇧 805 124 405ms 21 Nov 2021 457th annaproxy 805 124 408ms 20 Aug 2022 459th saito-ta 🇯🇵 803 118 4,927ms 8 Nov 2023 460th Herbert00709 🇵🇱 803 125 13ms 25 Jan 2025 461st MeWhenI 🇻🇦 801 87 1,300ms 8 Jun 2023 462nd m-tkach 🇺🇦 801 202 118ms 17 Dec 2023 463rd nstearns96 🇬🇧 800 79 46ms 23 Oct 2024 464th ovs-code 🇩🇪 798 96 1,118ms 3 Feb 2023 465th Steffan153 🇫🇮 797 85 73ms 18 Feb 2024 466th ovs-code 🇩🇪 797 154 462ms 29 Mar 2025 467th somebody1234 795 49 202ms 11 Dec 2018 468th janbehrens 🇩🇪 795 75 10ms 5 Oct 2020 469th MeWhenI 🇻🇦 794 51 66ms 8 Aug 2023 470th geofft 790 80 11ms 13 Dec 2020 470th betaveros 790 80 12ms 1 Jan 2023 470th albanian-laundromat 790 80 14ms 12 Jul 2025 473rd targrik 790 111 3,591ms 4 Jan 2025 474th jared-hughes 789 120 3,235ms 18 Sep 2024 475th voytxt 🇨🇿 788 75 145ms 3 Aug 2024 476th kg583 🇺🇸 787 86 56ms 23 Nov 2025 477th annaproxy 786 83 126ms 8 Aug 2022 478th thisishowmymindworks 🇳🇴 785 76 13ms 25 Aug 2020 478th trinityy-7 785 76 37ms 28 Jun 2024 480th clockworknazo 782 98 410ms 23 Oct 2022 First Prev 401–480 of 2,269 Next Last