The Calendar hole will go live in approximately 13 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 lynn 806 161 1,323ms 13 Feb 2022 322nd BambooleanLogic 🇸🇪 805 91 10ms 14 Dec 2022 322nd kirjavascript 805 91 10ms 14 Feb 2025 324th jacobly0 🇺🇸 805 122 4ms 3 Sep 2023 325th JayXon 🇺🇸 805 148 127ms 24 May 2025 326th DialFrost 🇸🇬 805 149 93ms 13 days ago 326th snoozingnewt 🇨🇦 805 149 105ms 13 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 GrayJoKing 🇦🇺 804 128 22ms 12 Feb 2023 332nd andre-lameirinhas 🇵🇹 803 129 16ms 29 Jul 2022 332nd Mikey-Beep 🇬🇧 803 129 17ms 6 Oct 2022 332nd jakobkordez 🇸🇮 803 129 37ms 1 Nov 2022 332nd cros107 🇦🇺 803 129 14ms 25 May 2024 332nd cubed-guy 803 129 16ms 9 Jun 2024 332nd wuduculfre 803 129 10ms 22 Jul 2025 338th MeWhenI 🇻🇦 803 311 1,706ms 7 Nov 2025 339th ovs-code 🇩🇪 802 122 5ms 7 Oct 2024 340th yzhs 🇩🇪 802 165 140ms 26 Jun 2023 341st ScottHamper 802 168 4,746ms 12 Nov 2024 342nd Szum123321 🇵🇱 802 233 199ms 20 Mar 2024 342nd DialFrost 🇸🇬 802 233 192ms 31 May 2025 344th JayXon 🇺🇸 801 61 35ms 3 May 2023 344th rniii 801 61 40ms 15 Sep 2023 344th olleicua 🇺🇸 801 61 42ms 6 Jan 2024 344th xsot 🇸🇬 801 61 39ms 23 Apr 2025 344th pardouin 🇫🇷 801 61 49ms 12 Sep 2025 344th beirigo 🇧🇷 801 61 53ms 17 Oct 2025 350th 4hg 🇺🇸 800 5 55ms 22 Jul 2022 350th bricknellj 800 5 51ms 26 Jul 2022 350th NewDefectus 🇮🇱 800 5 46ms 3 Aug 2022 350th 5quiwyrm 800 5 44ms 5 Oct 2022 350th CatsAreFluffy 800 5 51ms 20 Oct 2022 350th dzshn 800 5 51ms 3 Dec 2022 350th Vap0r1ze 800 5 46ms 3 Dec 2022 350th DayDun 🇸🇪 800 5 57ms 23 Jan 2023 350th emirps 800 5 56ms 3 Feb 2023 350th klixel 🇨🇦 800 5 61ms 7 Jun 2023 350th commandblockguy 🇺🇸 800 5 53ms 3 Aug 2023 350th msbranicky 800 5 49ms 4 Aug 2023 350th jacobly0 🇺🇸 800 5 49ms 2 Sep 2023 350th FlorianCassayre 🇫🇷 800 5 51ms 5 Sep 2023 350th rniii 800 5 46ms 19 Oct 2023 350th yuchuehw 800 5 45ms 4 Feb 2024 350th Yewzir 🇧🇪 800 5 57ms 23 Feb 2024 350th roupiq 🇵🇱 800 5 49ms 27 Feb 2024 350th BREMAUCY 🇫🇷 800 5 54ms 28 Mar 2024 350th olleicua 🇺🇸 800 5 47ms 1 Apr 2024 350th dokutan 800 5 69ms 16 Jun 2024 350th m-tkach 🇺🇦 800 5 66ms 17 Jul 2024 350th duckyluuk 🇳🇱 800 5 49ms 4 Sep 2024 350th NickTheEASDude 🇺🇸 800 5 74ms 30 Oct 2024 350th gigaprofisi 🇺🇸 800 5 52ms 10 Mar 2025 350th albanian-laundromat 800 5 46ms 20 Aug 2025 376th edsrzf 🇳🇿 800 159 44ms 6 Apr 2025 377th aadenboy 🇺🇸 799 123 4ms 27 hours ago 378th nwellnhof 🇩🇪 799 147 2ms 16 Feb 2022 379th Natanaelel 🇸🇪 798 60 1,358ms 13 Feb 2022 379th GrayJoKing 🇦🇺 798 60 1,302ms 8 May 2022 381st MeWhenI 🇻🇦 798 229 41ms 2 Jul 2023 382nd tayloia 🇬🇧 797 92 10ms 10 Jan 2023 382nd voytxt 🇨🇿 797 92 10ms 28 Dec 2023 382nd olleicua 🇺🇸 797 92 10ms 12 Feb 2024 382nd targrik 797 92 10ms 3 Apr 2025 382nd fuzzylojik-golf 🇺🇸 797 92 10ms 19 Jul 2025 387th CedricGebistorf 797 130 17ms 16 Mar 2022 387th Flekay 🇩🇪 797 130 16ms 19 Jun 2025 389th Steffan153 🇫🇮 797 131 3ms 29 Jan 2024 390th GrayJoKing 🇦🇺 797 137 96ms 2 Jun 2022 391st GrayJoKing 🇦🇺 796 40 63ms 13 Sep 2023 391st chunes3 🇺🇸 796 40 70ms 13 Sep 2023 391st Bubbler-4 796 40 69ms 13 Sep 2023 391st sisyphus-ppcg 🇦🇺 796 40 73ms 13 Sep 2023 391st gifti258 796 40 72ms 13 Sep 2023 391st ovs-code 🇩🇪 796 40 60ms 13 Sep 2023 391st GolfingSuccess 🇬🇷 796 40 69ms 15 Sep 2023 391st Steffan153 🇫🇮 796 40 76ms 17 Sep 2023 391st 4hg 🇺🇸 796 40 70ms 18 Sep 2023 391st primo-ppcg 🇹🇭 796 40 71ms 19 Sep 2023 First Prev 321–400 of 1,157 Next Last