The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
τ 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 161st Shanethegamer 🇺🇸 916 65 20ms 2 Jun 2022 161st dmrichwa 🇺🇸 916 65 20ms 2 Jun 2022 161st SirBogman 🇺🇸 916 65 21ms 8 Jun 2022 161st inventshah 916 65 19ms 11 Jun 2022 161st Alex-x90 🇺🇸 916 65 19ms 17 Feb 2023 161st Steffan153 🇫🇮 916 65 20ms 10 Apr 2023 161st Argeento 🇵🇱 916 65 19ms 8 Sep 2023 161st GrayJoKing 🇦🇺 916 65 19ms 7 Oct 2023 161st duckyluuk 🇳🇱 916 65 12ms 9 Oct 2024 161st edsrzf 🇳🇿 916 65 20ms 29 Aug 2025 171st edsrzf 🇳🇿 916 73 594ms 17 Nov 2025 172nd Lydxn 🇨🇦 916 76 1,307ms 29 Dec 2021 173rd zacjl 913 74 25ms 18 Dec 2024 174th sean-niemann 🇺🇸 912 59 141ms 6 Aug 2024 174th Steffan153 🇫🇮 912 59 141ms 6 Aug 2024 174th duckyluuk 🇳🇱 912 59 377ms 28 Aug 2024 174th lifthrasiir 🇰🇷 912 59 367ms 7 Dec 2024 178th primo-ppcg 🇹🇭 912 110 9ms 5 Oct 2020 178th HPWiz 🇳🇿 912 110 16ms 23 Sep 2025 180th sean-niemann 🇺🇸 912 123 261ms 11 hours ago 181st FlorianCassayre 🇫🇷 911 62 12ms 18 Sep 2023 181st DialFrost 🇸🇬 911 62 10ms 25 Sep 2023 181st Mukundan314 911 62 11ms 9 May 2025 184th nwellnhof 🇩🇪 911 157 286ms 1 May 2020 184th primo-ppcg 🇹🇭 911 157 606ms 27 May 2020 184th JayXon 🇺🇸 911 157 276ms 25 Jan 2021 184th Lydxn 🇨🇦 911 157 282ms 5 Oct 2021 188th primo-ppcg 🇹🇭 910 104 2,518ms 6 Feb 2023 189th canissimia 🇦🇶 910 382 4,293ms 14 Mar 2024 190th ovs-code 🇩🇪 908 130 4,784ms 18 Oct 2024 191st JayXon 🇺🇸 907 94 510ms 12 Mar 2022 191st sean-niemann 🇺🇸 907 94 499ms 14 Mar 2025 193rd HPWiz 🇳🇿 906 64 184ms 21 Dec 2024 193rd zacjl 906 64 234ms 9 May 2025 195th zacjl 906 74 58ms 16 May 2025 196th sean-niemann 🇺🇸 906 87 1,285ms 15 Jul 2025 197th sean-niemann 🇺🇸 905 72 164ms 13 Jul 2023 197th ovs-code 🇩🇪 905 72 142ms 4 Aug 2024 199th pardouin 🇫🇷 905 77 4,305ms 30 Nov 2024 200th sean-niemann 🇺🇸 905 93 808ms 25 Jun 2025 201st primo-ppcg 🇹🇭 904 153 138ms 5 Apr 2025 202nd Alex-x90 🇺🇸 903 42 288ms 25 Nov 2022 202nd FlorianCassayre 🇫🇷 903 42 2,533ms 2 Sep 2023 204th primo-ppcg 🇹🇭 902 45 84ms 3 Jul 2019 205th MeWhenI 🇻🇦 902 74 18ms 26 Apr 2024 206th JayXon 🇺🇸 901 105 113ms 16 Oct 2022 207th KasperKivimaeki 🇫🇮 901 131 95ms 21 Nov 2025 208th GrayJoKing 🇦🇺 899 54 498ms 13 Sep 2024 209th Lydxn 🇨🇦 899 69 3,180ms 5 Aug 2023 210th JayXon 🇺🇸 899 121 164ms 1 May 2023 210th DialFrost 🇸🇬 899 121 173ms 24 Mar 2025 212th Lydxn 🇨🇦 898 56 450ms 9 Jan 2022 213th HPWiz 🇳🇿 897 29 33ms 23 Sep 2018 213th jslip 897 29 34ms 24 Sep 2018 213th diddily 897 29 32ms 29 Oct 2019 213th yzhs 🇩🇪 897 29 37ms 9 Sep 2020 213th GrayJoKing 🇦🇺 897 29 33ms 5 Dec 2020 213th lynn 897 29 32ms 13 Apr 2021 213th Shanethegamer 🇺🇸 897 29 32ms 17 Apr 2021 213th JayXon 🇺🇸 897 29 33ms 29 Jul 2021 213th rak1507 🇬🇧 897 29 35ms 24 Oct 2021 213th Bubbler-4 897 29 36ms 30 Nov 2021 213th Lydxn 🇨🇦 897 29 33ms 16 Dec 2021 213th Frowny 897 29 33ms 20 Apr 2022 213th ovs-code 🇩🇪 897 29 32ms 14 May 2022 213th 4hg 🇺🇸 897 29 33ms 6 Jul 2022 213th Natanaelel 🇸🇪 897 29 33ms 17 Jul 2023 213th stackofbears 897 29 35ms 17 Dec 2023 213th 2bular 897 29 33ms 15 Oct 2025 230th Herbert00709 🇵🇱 897 60 385ms 13 May 2024 231st SB-945 897 63 11ms 8 Aug 2023 231st namelessiw 897 63 19ms 6 Dec 2023 233rd sean-niemann 🇺🇸 897 109 434ms 7 Aug 2023 233rd JayXon 🇺🇸 897 109 397ms 20 Mar 2025 235th primo-ppcg 🇹🇭 897 132 74ms 21 Jun 2022 236th HPWiz 🇳🇿 897 146 2,971ms 12 Oct 2023 237th primo-ppcg 🇹🇭 897 149 278ms 20 Jan 2022 238th primo-ppcg 🇹🇭 896 43 514ms 1 Oct 2018 239th pardouin 🇫🇷 896 60 125ms 28 Feb 2025 240th primo-ppcg 🇹🇭 896 112 58ms 26 Apr 2025 First Prev 161–240 of 2,257 Next Last