The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
United States 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 640th TheZwierzLF 🇵🇱 451 233 15ms 24 May 2025 642nd emgordon154 449 311 3ms 10 Jun 2025 643rd neihousaigaai 448 226 11ms 13 Mar 2021 644th guliyevemil1 🇦🇿 448 380 352ms 17 Apr 2020 645th KatieLG 🇬🇧 446 169 32ms 29 Aug 2024 646th erwoba 🇩🇪 444 157 3ms 10 days ago 647th MeWhenI 🇻🇦 444 178 2ms 12 Nov 2022 648th msbranicky 444 247 4,276ms 9 Jan 2025 649th rxdvd 443 237 11ms 3 Feb 2023 650th Natanaelel 🇸🇪 442 138 4ms 19 Jul 2023 651st User2654 442 231 2ms 9 Feb 2023 652nd JRaspass 🇬🇧 442 257 4ms 25 Sep 2022 653rd dokutan 439 236 6ms 11 Feb 2025 654th helbling 🇨🇭 437 232 10ms 6 Aug 2025 655th NerdyMcNerd42 437 240 9ms 12 Nov 2022 656th msbranicky 436 241 10ms 10 Jul 2023 657th LucaArgentiUCF 🇮🇹 435 386 41ms 6 Feb 2021 658th byronknoll 🇺🇸 433 234 11ms 12 May 2024 659th RedstoneTim 431 235 10ms 4 Jul 2021 660th bzijlema 🇳🇱 430 244 10ms 26 Jun 2025 660th Emutis 🇱🇹 430 244 10ms 13 Sep 2025 662nd FranklinJiaChen 428 245 10ms 4 Jul 2024 662nd NotEvenIndian 428 245 12ms 22 Oct 2024 662nd yanjs 428 245 10ms 4 Jul 2025 665th minicircle 428 405 250ms 21 Sep 2024 666th janbehrens 🇩🇪 427 287 4,233ms 20 Nov 2022 667th rjsbooth 427 399 357ms 21 Apr 2020 668th hoodadam 425 247 11ms 27 Feb 2020 668th codingisgreatbutiamnot 425 247 10ms 9 Aug 2024 670th snyderek 🇺🇸 425 288 601ms 10 Jul 2024 671st targrik 424 228 5ms 12 Jan 2025 672nd Nigel-C 422 249 11ms 30 May 2022 673rd omurakazuaki 🇯🇵 420 241 10ms 15 Feb 2021 674th OllieBoyne 🇬🇧 420 250 10ms 18 Aug 2022 675th kevpie 419 406 333ms 20 Apr 2020 676th jerrandolph 418 407 343ms 17 Apr 2020 677th SirBogman 🇺🇸 417 573 2ms 16 Mar 2020 678th dymowski 416 241 12ms 2 Feb 2020 679th dyc3 415 253 13ms 2 Jul 2020 680th ericlangedijk 🇸🇮 415 259 407ms 23 May 2023 681st juliansiebert 🇩🇪 414 197 268ms 12 Jul 2022 682nd anter69 🇭🇺 414 337 27ms 10 Nov 2025 683rd kyleclaassen 412 255 11ms 28 Feb 2022 683rd vishwathg 412 255 16ms 16 Sep 2022 685th Lucy-McGinnis 410 256 12ms 13 May 2020 685th guilhem-roy 🇫🇷 410 256 24ms 27 Jul 2023 687th iznax 410 262 384ms 21 Nov 2021 688th mothcolada 🇺🇸 408 257 12ms 5 Jul 2025 689th albanian-laundromat 407 376 3ms 29 Jun 2025 690th lukechampine 407 418 335ms 16 Apr 2020 691st TheZwierzLF 🇵🇱 406 231 544ms 25 days ago 692nd fenix-bear 404 260 10ms 7 days ago 693rd martinnorling 🇸🇪 401 262 10ms 17 Feb 2022 694th TimCurwick 🇺🇸 400 204 272ms 26 Jan 2021 695th TRexOnGit 397 255 10ms 4 Apr 2025 696th exodrifter 🇺🇸 397 433 138ms 26 Oct 2022 697th tnecio 396 265 10ms 19 Jun 2024 698th HolmDev 393 437 124ms 17 Sep 2025 699th Andriamanitra 🇫🇮 392 192 42ms 1 Sep 2022 700th msbranicky 390 241 630ms 16 Jan 2024 701st lorenzosim 390 345 609ms 13 Aug 2022 702nd safaorhan 388 261 10ms 17 Oct 2024 703rd cbrt-x 384 448 155ms 23 Apr 2024 704th SpeedyNinja 382 275 10ms 21 Oct 2020 705th Jonatan6 🇩🇰 381 268 2ms 11 Jun 2023 706th tomh1012 381 282 444ms 20 days ago 707th vezzick 380 276 12ms 12 Mar 2021 707th inverseLorentz 🇦🇺 380 276 10ms 13 Jun 2022 707th za3k 380 276 10ms 27 Oct 2022 707th EnTerr 380 276 9ms 9 Sep 2024 711th rollershutter 378 265 11ms 6 Apr 2025 712th PatrickStephansen 🇿🇦 378 268 11ms 13 Apr 2021 713th mathisfun271 378 278 19ms 29 Oct 2021 714th duartegomes 378 369 3ms 26 Jan 2021 715th ydevor 🇮🇱 376 279 11ms 25 Nov 2020 715th sjrct 376 279 9ms 6 Aug 2024 717th artembykov 374 271 10ms 3 May 2020 718th liamstrilchuk 372 272 11ms 10 Sep 2021 719th tsunderu 🇯🇵 370 276 2ms 9 Sep 2021 720th rowboat1 370 284 10ms 19 Jun 2022 First Prev 641–720 of 1,391 Next Last