The Calendar hole will go live in approximately 13 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 thospel 917 42 412ms 23 May 2018 162nd primo-ppcg 🇹🇭 916 53 503ms 5 Apr 2025 163rd Shanethegamer 🇺🇸 916 65 20ms 2 Jun 2022 163rd dmrichwa 🇺🇸 916 65 20ms 2 Jun 2022 163rd SirBogman 🇺🇸 916 65 21ms 8 Jun 2022 163rd inventshah 916 65 19ms 11 Jun 2022 163rd Alex-x90 🇺🇸 916 65 19ms 17 Feb 2023 163rd Steffan153 🇫🇮 916 65 20ms 10 Apr 2023 163rd Argeento 🇵🇱 916 65 19ms 8 Sep 2023 163rd GrayJoKing 🇦🇺 916 65 19ms 7 Oct 2023 163rd duckyluuk 🇳🇱 916 65 12ms 9 Oct 2024 163rd edsrzf 🇳🇿 916 65 20ms 29 Aug 2025 173rd edsrzf 🇳🇿 916 73 594ms 17 Nov 2025 174th Lydxn 🇨🇦 916 76 1,307ms 29 Dec 2021 175th zacjl 913 74 25ms 18 Dec 2024 176th sean-niemann 🇺🇸 912 59 141ms 6 Aug 2024 176th Steffan153 🇫🇮 912 59 141ms 6 Aug 2024 176th duckyluuk 🇳🇱 912 59 377ms 28 Aug 2024 176th lifthrasiir 🇰🇷 912 59 367ms 7 Dec 2024 180th primo-ppcg 🇹🇭 912 110 9ms 5 Oct 2020 180th HPWiz 🇳🇿 912 110 16ms 23 Sep 2025 182nd FlorianCassayre 🇫🇷 911 62 12ms 18 Sep 2023 182nd DialFrost 🇸🇬 911 62 10ms 25 Sep 2023 182nd Mukundan314 911 62 11ms 9 May 2025 185th nwellnhof 🇩🇪 911 157 286ms 1 May 2020 185th primo-ppcg 🇹🇭 911 157 606ms 27 May 2020 185th JayXon 🇺🇸 911 157 276ms 25 Jan 2021 185th Lydxn 🇨🇦 911 157 282ms 5 Oct 2021 189th primo-ppcg 🇹🇭 910 104 2,518ms 6 Feb 2023 190th canissimia 🇦🇶 910 382 4,293ms 14 Mar 2024 191st ovs-code 🇩🇪 908 130 4,784ms 18 Oct 2024 192nd JayXon 🇺🇸 907 94 510ms 12 Mar 2022 192nd sean-niemann 🇺🇸 907 94 499ms 14 Mar 2025 194th HPWiz 🇳🇿 906 64 184ms 21 Dec 2024 194th zacjl 906 64 234ms 9 May 2025 196th zacjl 906 74 58ms 16 May 2025 197th sean-niemann 🇺🇸 906 87 1,285ms 15 Jul 2025 198th sean-niemann 🇺🇸 905 72 164ms 13 Jul 2023 198th ovs-code 🇩🇪 905 72 142ms 4 Aug 2024 200th pardouin 🇫🇷 905 77 4,558ms 30 Nov 2024 201st sean-niemann 🇺🇸 905 93 808ms 25 Jun 2025 202nd primo-ppcg 🇹🇭 904 153 138ms 5 Apr 2025 203rd Alex-x90 🇺🇸 903 42 288ms 25 Nov 2022 203rd FlorianCassayre 🇫🇷 903 42 2,533ms 2 Sep 2023 205th primo-ppcg 🇹🇭 902 45 84ms 3 Jul 2019 206th MeWhenI 🇻🇦 902 74 18ms 26 Apr 2024 207th JayXon 🇺🇸 901 105 113ms 16 Oct 2022 208th KasperKivimaeki 🇫🇮 901 131 95ms 27 days ago 209th GrayJoKing 🇦🇺 899 54 498ms 13 Sep 2024 210th Lydxn 🇨🇦 899 69 3,180ms 5 Aug 2023 211th JayXon 🇺🇸 899 121 164ms 1 May 2023 211th DialFrost 🇸🇬 899 121 173ms 24 Mar 2025 213th Lydxn 🇨🇦 898 56 450ms 9 Jan 2022 214th HPWiz 🇳🇿 897 29 33ms 23 Sep 2018 214th jslip 897 29 34ms 24 Sep 2018 214th diddily 897 29 32ms 29 Oct 2019 214th yzhs 🇩🇪 897 29 37ms 9 Sep 2020 214th GrayJoKing 🇦🇺 897 29 33ms 5 Dec 2020 214th lynn 897 29 32ms 13 Apr 2021 214th Shanethegamer 🇺🇸 897 29 32ms 17 Apr 2021 214th JayXon 🇺🇸 897 29 33ms 29 Jul 2021 214th rak1507 🇬🇧 897 29 35ms 24 Oct 2021 214th Bubbler-4 897 29 36ms 30 Nov 2021 214th Lydxn 🇨🇦 897 29 33ms 16 Dec 2021 214th Frowny 897 29 33ms 20 Apr 2022 214th ovs-code 🇩🇪 897 29 32ms 14 May 2022 214th 4hg 🇺🇸 897 29 33ms 6 Jul 2022 214th Natanaelel 🇸🇪 897 29 33ms 17 Jul 2023 214th stackofbears 897 29 35ms 17 Dec 2023 214th 2bular 897 29 33ms 15 Oct 2025 231st Herbert00709 🇵🇱 897 60 385ms 13 May 2024 232nd SB-945 897 63 11ms 8 Aug 2023 232nd namelessiw 897 63 19ms 6 Dec 2023 234th sean-niemann 🇺🇸 897 109 434ms 7 Aug 2023 234th JayXon 🇺🇸 897 109 397ms 20 Mar 2025 236th primo-ppcg 🇹🇭 897 132 74ms 21 Jun 2022 237th HPWiz 🇳🇿 897 146 2,971ms 12 Oct 2023 238th primo-ppcg 🇹🇭 897 149 278ms 20 Jan 2022 239th primo-ppcg 🇹🇭 896 43 969ms 1 Oct 2018 240th pardouin 🇫🇷 896 60 125ms 28 Feb 2025 First Prev 161–240 of 2,258 Next Last