The Calendar hole will go live in approximately 7 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 880th 0dyse 395 160 997ms 23 Apr 2025 882nd inventshah 392 308 483ms 20 Apr 2021 883rd zakariamouhid 390 153 15ms 18 May 2023 884th PyPylia 🇦🇺 388 163 28ms 7 Aug 2020 884th jmerle 🇳🇱 388 163 15ms 6 Jul 2023 884th cefqrn 388 163 15ms 13 Apr 2025 887th doge1338 387 372 293ms 20 Mar 2021 888th ashwinvis 385 164 36ms 18 Apr 2020 888th brobbins2001 385 164 33ms 17 Oct 2022 888th codewrite 🇬🇧 385 164 16ms 28 Jun 2025 891st dymowski 383 165 12ms 3 May 2020 892nd jtaxen 381 166 14ms 26 Mar 2024 893rd Pena86 378 167 12ms 6 Jan 2022 894th edre 377 158 60ms 6 May 2018 895th Waffle3z 377 298 713ms 29 Oct 2020 896th msrawson 376 168 14ms 29 Aug 2018 897th LiamKrenn 374 169 36ms 21 Jul 2022 897th dillon-duncando 374 169 127ms 4 Oct 2022 899th edsrzf 🇳🇿 372 325 527ms 24 Sep 2025 900th epic-programmer-guy 370 171 37ms 17 Dec 2023 901st MeWhenI 🇻🇦 368 190 4,322ms 27 Oct 2024 902nd msbranicky 367 172 38ms 5 Jul 2023 902nd LHLaurini 🇧🇷 367 172 143ms 18 Jun 2024 902nd JunkIce 367 172 14ms 25 Nov 2024 902nd dokutan 367 172 14ms 24 Mar 2025 902nd yahelihol 367 172 20ms 10 Jun 2025 902nd Flekay 🇩🇪 367 172 13ms 10 Jul 2025 908th wh3n3v3r 🇨🇿 365 173 20ms 20 Nov 2024 909th TJK-S 363 174 36ms 23 Oct 2025 910th Shanethegamer 🇺🇸 361 181 133ms 25 May 2022 911th Shanethegamer 🇺🇸 360 75 451ms 20 Jun 2022 912th Herbert00709 🇵🇱 359 146 57ms 23 Nov 2024 913th martinnorling 🇸🇪 359 176 15ms 29 Mar 2022 913th cuboids 359 176 130ms 17 Jul 2024 915th roguh 🇬🇹 357 177 32ms 22 Jan 2024 916th MeWhenI 🇻🇦 357 701 9ms 28 Nov 2023 917th snoozingnewt 🇨🇦 354 170 482ms 11 Feb 2024 917th JunkIce 354 170 483ms 3 Dec 2024 917th dokutan 354 170 526ms 24 Mar 2025 920th AkashTandon167 353 179 160ms 6 Nov 2021 921st msbranicky 350 172 539ms 16 Jan 2024 922nd alfonsoalves 349 181 39ms 26 Feb 2024 922nd Emutis 🇱🇹 349 181 14ms 7 Oct 2025 924th Matistjati 345 183 15ms 2 Dec 2019 925th UnderKoen 🇳🇱 345 586 1ms 11 Nov 2024 926th NickTheEASDude 🇺🇸 343 174 15ms 25 Apr 2024 927th typeswitch-dev 🇵🇹 343 387 248ms 24 Jul 2023 928th roguh 🇬🇹 340 177 763ms 28 Jun 2025 929th magnickolas 338 187 21ms 29 Aug 2020 930th aliakseikalosha 337 296 430ms 27 Jun 2025 931st tetraxile 336 188 30ms 3 Oct 2021 932nd m-tkach 🇺🇦 335 603 3ms 15 Jun 2022 933rd LeeCamp 334 189 69ms 15 Feb 2022 933rd keelimeguy 🇺🇸 334 189 16ms 16 Dec 2023 935th Omega65536 🇩🇪 333 190 17ms 1 Dec 2022 936th bac0id 332 364 436ms 26 Sep 2023 937th PFischbeck 331 191 186ms 8 Dec 2017 937th luuumine 🇫🇷 331 191 24ms 7 Oct 2025 939th OllieBoyne 🇬🇧 329 192 436ms 23 Jan 2021 940th 52525rr 327 193 24ms 9 Jun 2025 941st sciencedjinn 324 195 14ms 8 Nov 2024 941st driri85 324 195 29ms 7 Jan 2025 943rd rollsroyce0 322 196 40ms 14 Sep 2024 944th boxjelly 321 186 16ms 13 Feb 2021 945th Apataras 320 377 574ms 28 Jun 2025 946th lmeuser 319 198 14ms 2 Dec 2017 947th emgordon154 319 634 4ms 11 Jul 2024 948th codingisgreatbutiamnot 316 200 37ms 4 Aug 2024 949th KatieLG 🇬🇧 314 644 4ms 10 Dec 2022 950th davidsaltacc 308 205 14ms 16 Nov 2023 951st c0d3-4-F00d 🇩🇪 303 331 4ms 29 Apr 2022 952nd dokutan 302 669 3ms 7 Nov 2025 953rd GameChaos 295 214 12ms 18 Apr 2020 954th TomasKazimir 294 215 40ms 18 Nov 2021 955th boxjelly 293 139 327ms 11 Feb 2021 956th atazzam 🇺🇸 293 216 662ms 4 Feb 2023 957th enbyte 289 219 12ms 4 Jun 2021 958th raphaelimahorn 289 418 428ms 3 Sep 2020 959th robin-scragg 283 223 13ms 25 Oct 2025 960th DialFrost 🇸🇬 281 575 27ms 18 Jan 2023 First Prev 881–960 of 2,285 Next Last