The Calendar hole will go live in approximately 4 days. Why not try and solve it ahead of time?
Reverse Polish Notation 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 321st BambooleanLogic 🇸🇪 806 91 10ms 14 Dec 2022 321st kirjavascript 806 91 10ms 14 Feb 2025 323rd GrayJoKing 🇦🇺 806 139 63ms 31 Jan 2025 324th lynn 806 161 1,323ms 13 Feb 2022 325th JayXon 🇺🇸 805 148 127ms 24 May 2025 326th DialFrost 🇸🇬 805 149 93ms 22 days ago 326th snoozingnewt 🇨🇦 805 149 105ms 21 days ago 328th kg583 🇺🇸 805 158 44ms 10 Nov 2025 329th stefangimmillaro 805 198 446ms 6 Oct 2025 330th kkoenig 805 227 271ms 23 Jan 2024 331st jacobly0 🇺🇸 804 122 3ms 3 Sep 2023 332nd GrayJoKing 🇦🇺 804 128 22ms 12 Feb 2023 333rd andre-lameirinhas 🇵🇹 803 129 16ms 29 Jul 2022 333rd Mikey-Beep 🇬🇧 803 129 17ms 6 Oct 2022 333rd jakobkordez 🇸🇮 803 129 37ms 1 Nov 2022 333rd cros107 🇦🇺 803 129 14ms 25 May 2024 333rd cubed-guy 803 129 16ms 9 Jun 2024 333rd wuduculfre 803 129 10ms 22 Jul 2025 339th MeWhenI 🇻🇦 803 311 1,706ms 7 Nov 2025 340th ovs-code 🇩🇪 802 122 5ms 7 Oct 2024 341st yzhs 🇩🇪 802 165 140ms 26 Jun 2023 342nd ScottHamper 802 168 3,375ms 12 Nov 2024 343rd Szum123321 🇵🇱 802 233 199ms 20 Mar 2024 343rd DialFrost 🇸🇬 802 233 186ms 31 May 2025 345th JayXon 🇺🇸 801 61 45ms 3 May 2023 345th rniii 801 61 43ms 15 Sep 2023 345th olleicua 🇺🇸 801 61 42ms 6 Jan 2024 345th xsot 🇸🇬 801 61 40ms 23 Apr 2025 345th pardouin 🇫🇷 801 61 43ms 12 Sep 2025 345th beirigo 🇧🇷 801 61 40ms 17 Oct 2025 351st 4hg 🇺🇸 800 5 50ms 22 Jul 2022 351st bricknellj 800 5 49ms 26 Jul 2022 351st NewDefectus 🇮🇱 800 5 43ms 3 Aug 2022 351st 5quiwyrm 800 5 52ms 5 Oct 2022 351st CatsAreFluffy 800 5 79ms 20 Oct 2022 351st dzshn 800 5 47ms 3 Dec 2022 351st Vap0r1ze 800 5 50ms 3 Dec 2022 351st DayDun 🇸🇪 800 5 47ms 23 Jan 2023 351st emirps 800 5 49ms 3 Feb 2023 351st klixel 🇨🇦 800 5 45ms 7 Jun 2023 351st commandblockguy 🇺🇸 800 5 49ms 3 Aug 2023 351st msbranicky 800 5 49ms 4 Aug 2023 351st jacobly0 🇺🇸 800 5 44ms 2 Sep 2023 351st FlorianCassayre 🇫🇷 800 5 48ms 5 Sep 2023 351st rniii 800 5 44ms 19 Oct 2023 351st yuchuehw 800 5 50ms 4 Feb 2024 351st Yewzir 🇧🇪 800 5 47ms 23 Feb 2024 351st roupiq 🇵🇱 800 5 45ms 27 Feb 2024 351st BREMAUCY 🇫🇷 800 5 48ms 28 Mar 2024 351st olleicua 🇺🇸 800 5 47ms 1 Apr 2024 351st dokutan 800 5 47ms 16 Jun 2024 351st m-tkach 🇺🇦 800 5 50ms 17 Jul 2024 351st duckyluuk 🇳🇱 800 5 50ms 4 Sep 2024 351st NickTheEASDude 🇺🇸 800 5 53ms 30 Oct 2024 351st gigaprofisi 🇺🇸 800 5 61ms 10 Mar 2025 351st albanian-laundromat 800 5 49ms 20 Aug 2025 377th edsrzf 🇳🇿 800 159 44ms 6 Apr 2025 378th nwellnhof 🇩🇪 799 147 2ms 16 Feb 2022 379th Natanaelel 🇸🇪 798 60 1,183ms 13 Feb 2022 379th GrayJoKing 🇦🇺 798 60 1,099ms 8 May 2022 381st aadenboy 🇺🇸 798 123 4ms 9 days ago 382nd MeWhenI 🇻🇦 798 229 41ms 2 Jul 2023 383rd Sakisan 🇧🇪 797 46 100ms 29 Jul 2022 384th tayloia 🇬🇧 797 92 10ms 10 Jan 2023 384th voytxt 🇨🇿 797 92 10ms 28 Dec 2023 384th olleicua 🇺🇸 797 92 10ms 12 Feb 2024 384th targrik 797 92 10ms 3 Apr 2025 384th fuzzylojik-golf 🇺🇸 797 92 10ms 19 Jul 2025 389th CedricGebistorf 797 130 17ms 16 Mar 2022 389th Flekay 🇩🇪 797 130 16ms 19 Jun 2025 391st Steffan153 🇫🇮 797 131 3ms 29 Jan 2024 392nd GrayJoKing 🇦🇺 797 137 96ms 2 Jun 2022 393rd GrayJoKing 🇦🇺 796 40 63ms 13 Sep 2023 393rd chunes3 🇺🇸 796 40 70ms 13 Sep 2023 393rd Bubbler-4 796 40 69ms 13 Sep 2023 393rd sisyphus-ppcg 🇦🇺 796 40 64ms 13 Sep 2023 393rd gifti258 796 40 72ms 13 Sep 2023 393rd ovs-code 🇩🇪 796 40 60ms 13 Sep 2023 393rd GolfingSuccess 🇬🇷 796 40 69ms 15 Sep 2023 393rd Steffan153 🇫🇮 796 40 76ms 17 Sep 2023 First Prev 321–400 of 1,160 Next Last