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 721st MeWhenI 🇻🇦 570 61 12ms 15 Feb 2025 722nd janbehrens 🇩🇪 570 88 268ms 3 Dec 2023 723rd tomh1012 567 105 10ms 13 Oct 2020 723rd Yax42 🇫🇷 567 105 9ms 5 Sep 2025 725th aksyristos 566 67 191ms 23 Jul 2023 726th dokutan 566 236 89ms 23 Jul 2025 727th bac0id 565 100 15ms 26 Sep 2023 728th MeWhenI 🇻🇦 565 149 54ms 12 Nov 2022 729th Shanethegamer 🇺🇸 564 110 958ms 2 Jun 2022 730th leon-w 559 101 54ms 4 Jan 2019 730th Lv0Sys 🇵🇱 559 101 22ms 19 days ago 732nd CatsAreFluffy 556 107 15ms 19 Dec 2022 732nd goodwyna21 556 107 10ms 27 Jan 2025 734th GalladeGuy 🇺🇸 556 180 65ms 25 May 2020 734th Waffle3z 556 180 496ms 8 Apr 2022 736th Soyo-Wind 552 177 414ms 6 Nov 2025 737th ShiraJoseph 🇺🇸 551 108 10ms 6 Feb 2023 738th Shanethegamer 🇺🇸 550 70 254ms 2 Jun 2022 739th KatieLG 🇬🇧 549 98 503ms 28 Oct 2024 740th dokutan 548 240 209ms 1 Jul 2025 741st MeWhenI 🇻🇦 547 144 782ms 21 Dec 2022 742nd MeWhenI 🇻🇦 543 231 139ms 6 Aug 2023 743rd elgan65536 542 255 122ms 11 Nov 2023 744th UnusedConfetti 541 75 43ms 6 Mar 2024 745th albanian-laundromat 540 206 2ms 25 Jun 2025 746th dokutan 535 208 2ms 27 Mar 2024 747th ndren 534 71 258ms 11 days ago 748th hiddicop 🇸🇪 534 76 49ms 23 Jan 2021 748th Betuaredead 534 76 45ms 16 Jan 2023 750th cure-honey 🇯🇵 534 259 140ms 7 Jul 2021 751st cros107 🇦🇺 533 106 1,597ms 5 Sep 2025 752nd m-tkach 🇺🇦 533 209 2ms 26 Oct 2022 753rd dcgjb 528 95 356ms 13 May 2024 754th jmerle 🇳🇱 528 107 15ms 6 Jul 2023 755th arrudagates 527 113 10ms 24 Jun 2021 756th MeWhenI 🇻🇦 524 264 152ms 12 Dec 2022 757th Lv0Sys 🇵🇱 522 114 15ms 19 days ago 758th yokasuretsu 521 74 454ms 30 Jun 2018 759th marcin7Cd 521 128 25ms 21 Mar 2021 760th NickTheEASDude 🇺🇸 518 109 841ms 20 Aug 2024 761st Yewzir 🇧🇪 515 216 2ms 18 Jan 2024 762nd jiaminglimjm 🇲🇾 513 110 14ms 27 Nov 2019 763rd 2bular 513 113 1,692ms 17 Apr 2024 764th Ephellon 513 116 11ms 2 Dec 2022 765th neihousaigaai 509 111 2,559ms 7 May 2021 765th dokutan 509 111 14ms 28 Mar 2025 767th dokutan 508 234 462ms 24 Sep 2025 768th nwellnhof 🇩🇪 508 667 20ms 19 Nov 2022 769th GalladeGuy 🇺🇸 506 198 5ms 25 May 2020 770th dokutan 506 215 107ms 28 Mar 2024 771st MeWhenI 🇻🇦 506 220 51ms 26 Aug 2023 772nd cbrt-x 506 235 414ms 14 Oct 2021 773rd wh3n3v3r 🇨🇿 504 112 21ms 20 Nov 2024 774th Yewzir 🇧🇪 504 234 69ms 23 Dec 2023 775th aksyristos 504 236 406ms 17 Feb 2023 776th snoozingnewt 🇨🇦 503 107 404ms 28 Sep 2025 777th inventshah 503 673 18ms 18 Nov 2022 778th inverseLorentz 🇦🇺 500 113 2,294ms 22 Feb 2024 778th cuboids 500 113 129ms 17 Jul 2024 780th Natanaelel 🇸🇪 498 54 60ms 25 Jul 2022 781st commandblockguy 🇺🇸 498 108 689ms 1 Sep 2025 782nd Herbert00709 🇵🇱 498 140 4,056ms 24 Oct 2024 783rd JunkIce 495 114 14ms 24 Nov 2024 784th janbehrens 🇩🇪 495 240 445ms 25 Apr 2023 785th galloj 🇨🇿 494 685 89ms 1 Mar 2023 786th fgrosshans 🇫🇷 491 115 12ms 8 May 2023 787th dokutan 490 241 432ms 20 Aug 2024 788th KatieLG 🇬🇧 489 200 460ms 27 Oct 2022 789th MeWhenI 🇻🇦 488 309 1,827ms 7 Nov 2025 790th dokutan 485 111 364ms 28 Mar 2025 791st frobinsonj 484 123 35ms 6 Dec 2019 792nd neihousaigaai 483 246 493ms 11 May 2021 793rd xy3 🇮🇪 479 118 18ms 18 Nov 2021 794th Yewzir 🇧🇪 477 228 102ms 6 Jul 2023 795th falsidge 475 119 117ms 17 Jun 2023 796th hajimehoshi 🇯🇵 474 302 291ms 16 Apr 2020 797th JunkIce 472 114 345ms 3 Dec 2024 798th galloj 🇨🇿 471 120 10ms 25 Jan 2021 798th befoster 471 120 22ms 10 Apr 2021 798th guilhem-roy 🇫🇷 471 120 15ms 9 Mar 2022 First Prev 721–800 of 2,258 Next Last