The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
brainfuck 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 641st Yewzir 🇧🇪 538 364 277ms 3 Jan 2024 642nd MeWhenI 🇻🇦 538 454 38ms 14 Jun 2023 643rd AlephSquirrel 537 190 23ms 31 May 2023 643rd CaedenHarper 🇨🇦 537 190 21ms 16 Oct 2025 645th blaztoma 🇱🇹 537 455 137ms 22 days ago 646th Johannesd3 536 193 2ms 9 Apr 2021 647th jbyuki 536 238 4ms 28 Aug 2020 648th arvidjonasson 536 246 410ms 8 Jun 2025 649th eranws 535 199 11ms 17 Oct 2022 650th DialFrost 🇸🇬 535 202 40ms 28 Feb 2025 651st OllieBoyne 🇬🇧 534 191 23ms 7 Apr 2022 651st htareque 534 191 21ms 12 Oct 2023 653rd pandapawskat 533 182 5ms 9 Sep 2021 653rd jb-lopez 🇺🇸 533 182 5ms 8 Nov 2021 655th zakariamouhid 533 200 12ms 4 Jun 2023 656th alemelis 532 159 1,505ms 15 Aug 2024 657th dokutan 532 248 81ms 28 Jun 2025 658th rak1507 🇬🇧 531 192 21ms 21 Oct 2021 658th LogicalJoe 531 192 23ms 17 Oct 2022 660th marshallward 🇺🇸 531 356 44ms 6 May 2025 661st mrmena 🇦🇺 531 369 278ms 29 Mar 2024 662nd Argeento 🇵🇱 530 170 142ms 3 Aug 2024 663rd Natanaelel 🇸🇪 528 193 26ms 11 Apr 2024 664th h3ra993huskp 🇯🇵 528 335 486ms 21 days ago 665th marcin7Cd 526 194 26ms 24 Jul 2021 665th scpchicken 🇵🇼 526 194 21ms 22 Jan 2023 665th zhaohm14 526 194 20ms 22 Jul 2025 668th rak1507 🇬🇧 524 156 36ms 2 Nov 2021 669th christiankuhl 523 195 22ms 29 May 2021 670th MeWhenI 🇻🇦 523 318 180ms 10 Sep 2022 671st uttumuttu 🇫🇮 522 204 26ms 4 Jan 2022 671st xShadowBlade 522 204 11ms 26 Dec 2024 673rd aliakseikalosha 521 339 448ms 14 Jun 2020 674th bizy-coder 520 179 593ms 20 Jan 2024 675th decorator-factory 520 196 23ms 15 Aug 2019 675th Secozzi 520 196 21ms 14 Jan 2021 677th Flying-Toast 520 199 2ms 17 Apr 2024 678th yevgeniyredko 520 313 399ms 3 Oct 2023 678th Skellybob56 520 313 391ms 12 Nov 2025 680th cbrt-x 520 340 431ms 14 Sep 2023 681st Shanethegamer 🇺🇸 519 309 350ms 6 May 2023 682nd RDShah 518 197 22ms 19 Jan 2021 682nd P-Quentin 🇫🇷 518 197 15ms 9 Aug 2022 682nd InigoK 🇺🇸 518 197 21ms 23 Sep 2025 682nd JOrE20 🇺🇸 518 197 19ms 17 days ago 686th msbranicky 518 321 11ms 10 Aug 2023 687th nwellnhof 🇩🇪 517 97 5ms 22 May 2022 688th Shanethegamer 🇺🇸 517 284 252ms 5 Oct 2024 689th bac0id 517 315 370ms 20 Sep 2023 690th hacker112 🇸🇪 515 207 11ms 22 Jun 2024 690th daniel-cardone 515 207 12ms 5 Jul 2025 692nd ILMTitan 515 316 432ms 21 Nov 2021 692nd jwalaszek 515 316 407ms 21 Nov 2021 694th CaedenHarper 🇨🇦 514 181 475ms 16 Oct 2025 695th Shanethegamer 🇺🇸 514 415 25ms 31 Oct 2021 696th weliveinhell 🇭🇹 513 458 202ms 4 Oct 2023 697th proton 🇩🇪 512 118 49ms 9 Jun 2020 698th neel11235813 512 202 2ms 27 Mar 2024 699th strattonwhisler 512 208 12ms 29 Jun 2023 700th DialFrost 🇸🇬 511 182 496ms 28 Jul 2024 701st janbehrens 🇩🇪 511 190 6ms 2 Jul 2023 702nd cros107 🇦🇺 510 200 21ms 29 Jun 2024 702nd andrewjc2000 510 200 22ms 10 Jul 2025 704th ShiraJoseph 🇺🇸 510 209 12ms 12 Feb 2023 705th DubiousDoggo 510 631 1,066ms 2 Dec 2021 706th AlephSquirrel 509 183 444ms 22 Jan 2024 707th edsrzf 🇳🇿 509 225 129ms 23 Mar 2025 708th jwonagel 509 320 405ms 2 Jun 2025 709th ovs-code 🇩🇪 508 279 4ms 22 Jul 2023 710th kkoenig 508 385 381ms 23 Jan 2024 710th CaedenHarper 🇨🇦 508 385 290ms 17 Nov 2025 712th face0xff 507 201 22ms 18 Oct 2021 712th AGoyet 507 201 21ms 16 Jul 2022 714th Kibble 507 210 13ms 11 Jul 2020 714th 52525rr 507 210 12ms 20 Oct 2025 716th weliveinhell 🇭🇹 507 321 384ms 18 Jul 2024 717th scpchicken 🇵🇼 506 99 21ms 28 Feb 2023 718th khuldraeseth 505 202 25ms 11 Apr 2018 718th blaztoma 🇱🇹 505 202 20ms 15 Nov 2025 720th jacobly0 🇺🇸 505 253 3ms 3 Sep 2023 First Prev 641–720 of 1,400 Next Last