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 880th dillon-duncando 374 169 127ms 4 Oct 2022 882nd edsrzf 🇳🇿 372 325 527ms 24 Sep 2025 883rd epic-programmer-guy 370 171 37ms 17 Dec 2023 884th MeWhenI 🇻🇦 368 190 3,380ms 27 Oct 2024 885th msbranicky 367 172 38ms 5 Jul 2023 885th LHLaurini 🇧🇷 367 172 143ms 18 Jun 2024 885th JunkIce 367 172 14ms 25 Nov 2024 885th dokutan 367 172 14ms 24 Mar 2025 885th yahelihol 367 172 20ms 10 Jun 2025 885th Flekay 🇩🇪 367 172 13ms 10 Jul 2025 891st wh3n3v3r 🇨🇿 365 173 20ms 20 Nov 2024 892nd TJK-S 363 174 36ms 23 Oct 2025 893rd Shanethegamer 🇺🇸 361 181 133ms 25 May 2022 894th Shanethegamer 🇺🇸 360 75 451ms 20 Jun 2022 895th Herbert00709 🇵🇱 359 146 57ms 23 Nov 2024 896th martinnorling 🇸🇪 359 176 15ms 29 Mar 2022 896th cuboids 359 176 130ms 17 Jul 2024 898th roguh 🇬🇹 357 177 32ms 22 Jan 2024 899th MeWhenI 🇻🇦 357 701 9ms 28 Nov 2023 900th snoozingnewt 🇨🇦 354 170 482ms 11 Feb 2024 900th JunkIce 354 170 483ms 3 Dec 2024 900th dokutan 354 170 526ms 24 Mar 2025 903rd AkashTandon167 353 179 160ms 6 Nov 2021 904th msbranicky 350 172 539ms 16 Jan 2024 905th alfonsoalves 349 181 39ms 26 Feb 2024 905th Emutis 🇱🇹 349 181 14ms 7 Oct 2025 907th Matistjati 345 183 15ms 2 Dec 2019 908th UnderKoen 🇳🇱 345 586 1ms 11 Nov 2024 909th NickTheEASDude 🇺🇸 343 174 15ms 25 Apr 2024 910th typeswitch-dev 🇵🇹 343 387 248ms 24 Jul 2023 911th roguh 🇬🇹 340 177 763ms 28 Jun 2025 912th magnickolas 338 187 21ms 29 Aug 2020 913th aliakseikalosha 337 296 430ms 27 Jun 2025 914th tetraxile 336 188 30ms 3 Oct 2021 915th m-tkach 🇺🇦 335 603 3ms 15 Jun 2022 916th LeeCamp 334 189 69ms 15 Feb 2022 916th keelimeguy 🇺🇸 334 189 16ms 16 Dec 2023 918th Omega65536 🇩🇪 333 190 17ms 1 Dec 2022 919th bac0id 332 364 436ms 26 Sep 2023 920th PFischbeck 331 191 186ms 8 Dec 2017 920th luuumine 🇫🇷 331 191 24ms 7 Oct 2025 922nd OllieBoyne 🇬🇧 329 192 436ms 23 Jan 2021 923rd 52525rr 327 193 24ms 9 Jun 2025 924th sciencedjinn 324 195 14ms 8 Nov 2024 924th driri85 324 195 29ms 7 Jan 2025 926th rollsroyce0 322 196 40ms 14 Sep 2024 927th boxjelly 321 186 16ms 13 Feb 2021 928th Apataras 320 377 574ms 28 Jun 2025 929th lmeuser 319 198 14ms 2 Dec 2017 930th emgordon154 319 634 4ms 11 Jul 2024 931st codingisgreatbutiamnot 316 200 37ms 4 Aug 2024 932nd KatieLG 🇬🇧 314 644 4ms 10 Dec 2022 933rd davidsaltacc 308 205 14ms 16 Nov 2023 934th c0d3-4-F00d 🇩🇪 303 331 4ms 29 Apr 2022 935th dokutan 302 669 3ms 7 Nov 2025 936th GameChaos 295 214 12ms 18 Apr 2020 937th TomasKazimir 294 215 40ms 18 Nov 2021 938th atazzam 🇺🇸 293 216 662ms 4 Feb 2023 939th boxjelly 291 139 226ms 11 Feb 2021 940th enbyte 289 219 12ms 4 Jun 2021 941st raphaelimahorn 289 418 428ms 3 Sep 2020 942nd robin-scragg 283 223 13ms 25 Oct 2025 943rd DialFrost 🇸🇬 281 575 27ms 18 Jan 2023 944th adamnielson42 🇺🇸 280 131 483ms 2 Oct 2023 945th r-benson 🇬🇧 277 228 17ms 31 Jan 2023 945th tomc 277 228 719ms 29 Aug 2023 947th Jviscus1 272 232 15ms 24 Apr 2020 948th Andrey2001 271 222 740ms 26 Nov 2025 949th CRHillman 270 234 41ms 16 Aug 2018 949th j-Ewan 270 234 16ms 10 Mar 2022 951st twocatsinatrenchcoat 263 240 56ms 15 Apr 2022 952nd Schmitt-Very-Cool 262 461 642ms 3 Oct 2025 953rd orthoplex 🇨🇽 261 774 2ms 9 Jun 2024 954th SniperSmiley 🇺🇸 260 124 124ms 26 Nov 2022 955th Stockoh 🇫🇷 260 243 25ms 26 Apr 2024 956th jakobkordez 🇸🇮 259 244 55ms 31 Oct 2022 957th Yewzir 🇧🇪 257 374 540ms 20 Nov 2025 958th jerrandolph 256 562 309ms 30 Sep 2025 959th leon-w 252 251 54ms 4 Jan 2019 960th jmerle 🇳🇱 252 992 7ms 4 Jul 2023 First Prev 881–960 of 2,268 Next Last