The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Happy Numbers in Java 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 1st sean-niemann 🇺🇸 1,000 70 417ms 24 Sep 2025 1st JayXon 🇺🇸 1,000 70 544ms 24 Sep 2025 1st namelessiw 1,000 70 437ms 4 Oct 2025 1st MeWhenI 🇻🇦 1,000 70 458ms 7 Nov 2025 1st Lydxn 🇨🇦 1,000 70 337ms 13 days ago 6th nwellnhof 🇩🇪 886 79 451ms 25 Sep 2025 6th stefangimmillaro 886 79 437ms 6 Oct 2025 6th DialFrost 🇸🇬 886 79 321ms 14 Nov 2025 6th h3ra993huskp 🇯🇵 886 79 459ms 25 days ago 6th ScottHamper 886 79 440ms 25 days ago 6th edsrzf 🇳🇿 886 79 373ms 17 hours ago 12th Yewzir 🇧🇪 795 88 386ms 2 Oct 2025 13th Jacob385 787 89 431ms 27 Oct 2025 14th dokutan 769 91 500ms 24 Sep 2025 15th Yax42 🇫🇷 761 92 413ms 12 Nov 2025 16th jared-hughes 745 94 444ms 24 Sep 2025 17th snoozingnewt 🇨🇦 737 95 356ms 26 days ago 18th primo-ppcg 🇹🇭 654 107 410ms 24 Apr 2020 18th prplz 🇦🇺 654 107 402ms 7 Jul 2020 18th Steffan153 🇫🇮 654 107 404ms 9 Aug 2024 21st Shanethegamer 🇺🇸 636 110 445ms 25 Sep 2025 22nd kmathis22 631 111 413ms 20 Nov 2025 22nd ethanlally 631 111 355ms 23 Nov 2025 22nd KasperKivimaeki 🇫🇮 631 111 384ms 24 days ago 25th xkacer 🇨🇿 593 118 428ms 20 Nov 2020 25th CaedenHarper 🇨🇦 593 118 447ms 3 Oct 2025 27th Apataras 579 121 397ms 25 Jul 2025 28th Babafaba 574 122 396ms 14 Oct 2025 29th janbehrens 🇩🇪 560 125 387ms 20 Jun 2023 30th JunkIce 547 128 359ms 23 Feb 2025 30th Schmitt-Very-Cool 547 128 422ms 30 Sep 2025 32nd ravnskjaer 🇩🇰 515 136 332ms 10 days ago 33rd HumanoidCPU 511 137 648ms 8 Nov 2025 34th inventshah 479 146 387ms 17 Jun 2022 35th Irratix 🇳🇱 476 147 419ms 11 Dec 2021 36th neihousaigaai 461 152 397ms 8 May 2021 37th boxjelly 458 153 401ms 17 Feb 2021 38th KatieLG 🇬🇧 455 154 427ms 24 Sep 2025 39th Liibe 449 156 427ms 25 Sep 2025 40th Re-Adventures 🇮🇳 446 157 385ms 8 Mar 2021 41st cbrt-x 432 162 375ms 1 Sep 2021 42nd Natanaelel 🇸🇪 424 165 375ms 31 Mar 2022 43rd baumpilz 409 171 387ms 17 Dec 2020 44th KatieLG-Transpiler 🇬🇧 395 177 357ms 23 Jun 2022 45th xbxbxb007 393 178 397ms 11 Jan 2024 46th melikebuyruk 389 180 381ms 22 Mar 2021 46th yoshykai 389 180 390ms 15 Apr 2025 48th msbranicky 374 187 376ms 9 Jan 2024 49th yashima 372 188 494ms 21 Oct 2024 50th bac0id 365 192 376ms 30 Jun 2024 51st benradclyffe 361 194 404ms 15 May 2023 52nd sonisonjames 355 197 375ms 11 Dec 2022 53rd mokymok 🇺🇸 350 200 378ms 9 Nov 2021 53rd syspro86 350 200 548ms 31 Jul 2024 55th luca1339 338 207 382ms 9 May 2024 56th jiaminglimjm 🇲🇾 337 208 395ms 4 Jul 2020 57th retrohun 333 210 379ms 27 Dec 2022 57th Mabeloid 🇳🇴 333 210 386ms 20 Sep 2024 59th jonah1068 327 214 393ms 15 Sep 2023 60th zt14427 326 215 378ms 2 May 2023 61st bwat2 293 239 417ms 10 Mar 2022 62nd oeL87 251 279 421ms 29 Apr 2024 63rd DaCuteRaccoon 217 322 410ms 30 Nov 2022 64th theunofficialcoder 216 324 420ms 21 Jan 2024 65th Grimmjow91 203 344 405ms 3 Jun 2020 66th gianlab 190 369 399ms 30 Apr 2020 67th arvindrajarajan08 157 447 423ms 28 Aug 2025 68th tejokumar 141 496 412ms 22 Jan 2022 69th oganaa 125 559 380ms 6 Feb 2023 70th PierceZ 86 818 431ms 29 Nov 2023 1–70 of 70
