The Calendar hole will go live in approximately 68 mins. Why not try and solve it ahead of time?
PalindromemordnilaP in all languages 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 ArkScript 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 ArkScript 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 641st codewrite 🇬🇧 489 181 388ms 28 hours ago 642nd xyangst 488 128 11ms 12 Oct 2024 642nd 123mjb 488 128 10ms 19 Nov 2025 644th alphafalfa 480 105 4ms 1 Nov 2024 645th snoozingnewt 🇨🇦 480 120 118ms 14 Oct 2025 646th snoozingnewt 🇨🇦 479 185 387ms 4 Oct 2025 647th snoozingnewt 🇨🇦 476 189 5ms 9 Oct 2025 648th rucin93 🇵🇱 476 251 221ms 5 Sep 2024 649th junkondo-jp 475 149 10ms 15 Dec 2024 650th KatieLG 🇬🇧 475 292 7ms 1 Sep 2024 651st rboath 470 159 109ms 18 Dec 2024 652nd janAkali 🇷🇺 470 171 385ms 17 May 2025 653rd DialFrost 🇸🇬 467 207 461ms 24 Sep 2025 654th R4z0rX 466 152 10ms 1 Sep 2024 655th iczelia 🇩🇪 463 194 2ms 11 Oct 2025 656th Stockoh 🇫🇷 456 137 11ms 17 Oct 2024 657th two-bad 🇬🇧 454 156 11ms 4 Oct 2024 658th brimstonetrader 452 138 10ms 17 Oct 2024 659th snoozingnewt 🇨🇦 449 186 8ms 1 Sep 2024 660th JOrE20 🇺🇸 448 271 26ms 6 days ago 661st msbranicky 445 269 217ms 1 Sep 2024 662nd Shanethegamer 🇺🇸 438 115 2ms 1 Sep 2024 663rd ehulinsky 🇺🇸 432 122 3ms 3 Apr 2025 664th Yax42 🇫🇷 431 224 452ms 5 Oct 2025 665th aksyristos 418 101 38ms 17 Nov 2024 666th MeWhenI 🇻🇦 411 260 72ms 13 Jun 2025 667th HunterC14 403 155 10ms 21 Oct 2024 668th Jacob385 402 240 398ms 4 Sep 2024 669th bac0id 402 266 2,538ms 10 Jan 2025 670th zakariamouhid 398 178 14ms 14 Sep 2024 671st galloj 🇨🇿 396 101 10ms 4 Sep 2024 672nd Naitzirch 🇳🇱 395 158 11ms 3 Jul 2025 673rd varhammer 🇷🇺 389 235 8ms 20 Oct 2025 674th Apzyte-Gamer 378 165 10ms 28 Oct 2024 675th CyberTapir 369 169 10ms 1 Sep 2024 676th IISResetMe 366 127 359ms 17 Nov 2024 677th Giantnoodlemonster 365 246 2ms 27 Sep 2024 678th MeWhenI 🇻🇦 363 135 7ms 26 Sep 2024 679th rollershutter 355 176 10ms 18 Nov 2024 680th Mikey-Beep 🇬🇧 354 193 14ms 13 Aug 2025 681st nephila-nacrea 🇬🇧 283 132 3ms 4 Sep 2024 682nd AidanWalter 282 221 11ms 3 Jan 2025 683rd bidger 262 369 411ms 20 Sep 2024 684th KatieLG 🇬🇧 262 459 1,375ms 15 Sep 2024 685th timhaj 🇸🇮 261 239 10ms 19 Sep 2024 686th KatieLG 🇬🇧 260 460 191ms 15 Sep 2024 687th snoozingnewt 🇨🇦 241 444 1,110ms 6 Oct 2025 688th KatieLG 🇬🇧 200 401 175ms 15 Sep 2024 689th KatieLG 🇬🇧 176 398 7ms 15 Sep 2024 690th KatieLG 🇬🇧 171 768 259ms 15 Sep 2024 691st KatieLG 🇬🇧 113 466 3ms 15 Sep 2024 692nd Msleizak 🇫🇷 110 424 283ms 7 Feb 2025 693rd KatieLG 🇬🇧 103 937 406ms 15 Sep 2024 694th KatieLG 🇬🇧 86 1,032 399ms 15 Sep 2024 695th dokutan 64 1,663 72ms 23 Apr 2025 696th dokutan 54 1,663 2ms 23 Apr 2025 697th darrenks 0 10 65ms 19 Apr 2025 697th lyphyser 0 10 66ms 25 May 2025 699th 2bular 0 11 64ms 23 Mar 2025 699th Natanaelel 🇸🇪 0 11 73ms 25 Mar 2025 699th plcc0 0 11 68ms 5 May 2025 702nd kg583 🇺🇸 0 12 215ms 14 May 2025 703rd lyxal 🇦🇺 0 14 673ms 17 May 2025 704th namelessiw 0 16 145ms 5 Nov 2025 705th plcc0 0 17 677ms 20 Mar 2025 706th GolfingSuccess 🇬🇷 0 28 130ms 13 Aug 2025 706th Nxllpointer 0 28 3ms 10 Nov 2025 708th KatieLG 🇬🇧 0 29 4ms 9 Feb 2025 708th Shanethegamer 🇺🇸 0 29 3ms 29 May 2025 710th AlephSquirrel 0 30 4ms 1 Jul 2025 711th ovs-code 🇩🇪 0 39 14ms 8 Jun 2025 712th GolfingSuccess 🇬🇷 0 75 2ms 5 Aug 2025 713th dokutan 0 86 68ms 28 Jun 2025 714th sean-niemann 🇺🇸 0 90 91ms 27 Apr 2025 715th HumanoidCPU 0 111 84ms 22 Nov 2025 716th edsrzf 🇳🇿 0 135 184ms 26 Jun 2025 First Prev 641–716 of 716