The Calendar hole will go live in approximately 3 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 240th coreynash 833 88 9ms 15 Feb 2024 242nd MeWhenI 🇻🇦 833 164 432ms 19 Jun 2025 243rd Steffan153 🇫🇮 833 201 32ms 9 Jun 2024 244th btnlq 832 173 3ms 24 Sep 2022 245th emgordon154 831 162 3,758ms 30 Jan 2025 246th stefangimmillaro 830 98 977ms 10 Dec 2024 247th shinh 829 59 47ms 21 Jun 2022 247th tatzyr 🇯🇵 829 59 41ms 24 Mar 2025 247th lacrosse 829 59 131ms 15 days ago 250th GrayJoKing 🇦🇺 829 118 8ms 21 Aug 2024 251st RYNO8 829 125 16ms 16 Aug 2022 251st duckyluuk 🇳🇱 829 125 41ms 23 Feb 2024 253rd Z-snails 827 160 141ms 28 Feb 2023 253rd Jeremy-Stafford 827 160 146ms 28 Feb 2023 255th acotis 827 226 206ms 9 Jun 2025 256th AdrienHache 🇫🇷 826 80 50ms 29 Nov 2024 256th lyphyser 826 80 50ms 5 Jan 2025 258th sisyphus-ppcg 🇦🇺 826 101 4ms 14 Feb 2022 259th jkelly467 826 163 3,863ms 27 days ago 260th primo-ppcg 🇹🇭 825 125 6ms 31 Jan 2023 261st snyderek 🇺🇸 825 170 62ms 1 Dec 2024 262nd saito-ta 🇯🇵 824 73 279ms 25 Jan 2023 263rd btnlq 824 76 2ms 7 Nov 2022 264th ScottHamper 824 89 10ms 18 Feb 2022 264th Shanethegamer 🇺🇸 824 89 10ms 14 Mar 2025 266th edsrzf 🇳🇿 824 99 5ms 17 Jan 2025 267th kg583 🇺🇸 824 100 522ms 5 Jun 2024 267th sean-niemann 🇺🇸 824 100 538ms 6 Jun 2025 269th lynn 824 203 33ms 16 Jul 2023 270th ovs-code 🇩🇪 823 113 116ms 2 Jul 2025 271st Steffan153 🇫🇮 822 99 894ms 4 May 2023 272nd dzshn 822 126 16ms 15 Aug 2022 272nd stefangimmillaro 822 126 15ms 10 Nov 2023 272nd fgrosshans 🇫🇷 822 126 12ms 17 Jul 2024 272nd NickTheEASDude 🇺🇸 822 126 18ms 21 Aug 2024 272nd Pyroan 822 126 16ms 13 Mar 2025 277th sean-niemann 🇺🇸 822 127 3ms 8 Jan 2025 278th Steffan153 🇫🇮 822 135 98ms 4 May 2023 279th strout 822 161 149ms 15 Dec 2023 280th Shanethegamer 🇺🇸 821 158 1,504ms 26 Oct 2023 281st m-tkach 🇺🇦 820 226 4ms 12 Feb 2025 282nd lynn 819 228 235ms 6 Jul 2024 283rd edsrzf 🇳🇿 818 89 1,433ms 29 Sep 2025 284th Shanethegamer 🇺🇸 818 122 7ms 12 Apr 2024 285th tomtheisen 🇺🇸 818 167 376ms 15 Nov 2022 286th primo-ppcg 🇹🇭 816 100 6ms 21 Aug 2023 287th m-tkach 🇺🇦 816 101 417ms 21 Jan 2024 287th pardouin 🇫🇷 816 101 378ms 23 Jun 2024 289th MaxElf999 816 127 16ms 10 Nov 2022 289th DrakeSeteraO 816 127 24ms 28 Oct 2025 289th blaztoma 🇱🇹 816 127 16ms 3 days ago 292nd rucin93 🇵🇱 816 128 2ms 12 Jun 2025 293rd HPWiz 🇳🇿 815 45 26ms 29 Jul 2022 294th Shanethegamer 🇺🇸 815 60 42ms 12 Apr 2024 295th NewDefectus 🇮🇱 815 90 10ms 12 Feb 2022 295th didion0 🇺🇸 815 90 10ms 17 Feb 2022 295th uttumuttu 🇫🇮 815 90 11ms 5 Mar 2022 295th thisishowmymindworks 🇳🇴 815 90 10ms 24 Jun 2024 299th Shanethegamer 🇺🇸 815 134 82ms 4 Jun 2025 300th edsrzf 🇳🇿 815 157 376ms 3 Oct 2025 301st inventshah 815 172 57ms 29 Mar 2025 302nd btnlq 814 32 4ms 16 Jul 2023 302nd MeWhenI 🇻🇦 814 32 4ms 16 Jul 2023 302nd Steffan153 🇫🇮 814 32 4ms 16 Jul 2023 302nd ovs-code 🇩🇪 814 32 3ms 16 Jul 2023 302nd fuzzylojik-golf 🇺🇸 814 32 4ms 18 Sep 2025 307th Shanethegamer 🇺🇸 814 166 146ms 3 Dec 2022 308th scpchicken 🇵🇼 812 59 1,327ms 13 Feb 2022 309th MeWhenI 🇻🇦 812 87 20ms 2 Oct 2022 310th primo-ppcg 🇹🇭 812 225 43ms 2 May 2025 311th Shanethegamer 🇺🇸 812 306 580ms 30 Jan 2025 312th mtirado1 811 121 2ms 23 Dec 2022 313th MarcMush 🇫🇷 810 101 518ms 13 Jan 2024 314th TFeld00 🇩🇰 809 128 112ms 22 Apr 2022 314th fourth-bit 809 128 15ms 18 Nov 2022 314th Command-Master 809 128 102ms 29 Sep 2023 314th mathisfun271 809 128 35ms 13 Feb 2024 318th elgan65536 809 231 204ms 3 Oct 2023 319th Shanethegamer 🇺🇸 808 101 6ms 14 Jan 2024 320th GolfingSuccess 🇬🇷 808 102 424ms 19 Feb 2025 First Prev 241–320 of 1,161 Next Last