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    The Calendar hole will go live in approximately . Why not try and solve it ahead of time?

    retrohun

    86,395
    81,568
    🦄2
    💎6
    🥇52
    🥈57
    🥉65

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    123 / 123 Holes

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    62 / 62 Langs

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    89 / 98 Cheevos

    📅

    12 Days of Christmas
    11th13th5th21st 43rd103rd153rd110th 16th 43rd28th19th20th28th 19th 16th 72nd26th 50th14th17th 123rd399th 32nd21st 67th31st11th20th40th66th134th13th1,021st19th20th 96th86th 5th24th50th14th 17th24th19th
    24 Game
    7th2nd 22nd 103rd 2nd
    99 Bottles of Beer
    12th13th7th15th 37th111th149th76th 12th 26th17th20th25th23rd 20th 15th 67th22nd 48th16th16th 130th484th 32nd13th 67th27th13th17th42nd73rd145th16th1,066th22nd18th 92nd75th 4th21st39th18th 15th22nd11th
    Abundant Numbers
    19th11th7th26th 20th35th145th130th 28th 26th35th25th36th23rd 26th 28th 80th37th 87th12th29th 140th345th 55th49th 67th30th15th27th40th64th92nd16th254th21st33rd 114th102nd 3rd18th38th11th 23rd12th22nd
    Abundant Numbers (Long)
    11th8th6th23rd 14th55th71st90th 16th 21st28th23rd35th18th 19th 19th 46th31st 53rd 18th 76th168th 42nd39th 49th25th13th17th28th43rd37th12th535th22nd23rd 66th59th 2nd9th23rd11th 17th10th18th
    Arabic to Roman
    10th5th 3rd
    Arithmetic Numbers
    2nd 4th
    Arrows
    4th 4th
    Ascending Primes
    2nd 28th 32nd 87th 3rd7th
    ASCII Table
    9th15th3rd18th 36th49th63rd59th 22nd14th13th16th12th 11th 15th 39th27th 18th11th14th 49th137th 18th20th 33rd21st11th12th18th30th42nd8th379th13th19th 53rd39th 5th6th15th10th 11th6th12th
    Billiards
    2nd 92nd
    brainfuck
    3rd3rd 51st 116th
    Card Number Validation
    4th 3rd
    Catalan Numbers
    22nd8th6th11th 11th23rd39th28th 14th 24th22nd21st23rd20th 19th 8th 34th35th 43rd8th38th 44th110th 39th16th 16th13th8th9th25th13th39th15th1st9th25th 65th17th 6th7th6th17th 15th5th9th
    Catalan’s Constant
    8th7th6th13th 15th13th23rd22nd 22nd12th17th16th9th 16th 15th 18th20th 12th6th 35th60th 56th7th 22nd6th6th20th12th11th28th10th207th14th13th 27th13th 8th6th21st16th 8th4th9th
    Christmas Trees
    10th3rd4th16th 30th74th114th57th 21st27th19th21st10th 16th 16th 40th24th 40th12th15th 73rd292nd 28th19th 52nd24th9th16th34th59th81st10th167th15th25th 94th57th 7th13th27th12th 16th8th16th
    Collatz
    19th17th6th25th 15th91st112th142nd 17th 25th22nd27th36th20th 21st 19th 51st41st 66th11th23rd 108th271st 45th40th 63rd27th17th19th30th57th55th20th240th26th23rd 76th93rd 8th6th33rd17th 21st10th26th
    CSS Colors
    6th17th 5th
    Cubes
    5th6th6th13th 24th47th43rd26th 16th13th11th13th9th 10th 12th 26th16th 18th8th11th 41st109th 17th11th 24th15th4th12th15th16th39th6th351st10th14th 42nd27th 17th11th9th7th 11th7th9th
    Day of Week
    1st5th 120th 3rd
    DFA Simulator
    2nd
    Diamonds
    9th14th3rd16th 41st88th69th52nd 18th66th14th20th10th 11th 16th 31st29th 38th10th20th 54th170th 31st19th 42nd21st7th15th23rd38th52nd10th569th11th26th 89th36th 5th10th17th11th 15th9th8th
    Divisors
    25th14th5th25th 15th52nd159th56th 20th 40th39th26th34th25th 30th 20th 87th38th 124th17th61st 167th598th 57th40th 114th36th16th31st55th134th101st18th118th25th18th 171st119th 5th18th50th21st 25th13th28th
    Emirp Numbers
    15th16th7th15th 28th62nd49th37th 33rd 19th20th18th22nd14th 15th 17th 41st22nd 59th13th31st 51st227th 24th30th 35th19th6th17th31st36th51st15th197th15th24th 120th29th 3rd8th14th11th 17th6th13th
    Emirp Numbers (Long)
    8th12th7th15th 16th51st40th35th 12th 19th17th15th20th11th 10th 13th 25th19th 26th8th18th 35th97th 18th25th 25th15th7th14th16th24th22nd8th243rd14th17th 47th31st 5th4th13th9th 12th5th12th
    Emojify
    6th 5th
    Evil Numbers
    25th5th6th24th19th30th58th128th50th27th31st35th55th44th41st19th34th26th 18th30th22nd27th17th79th41st14th83rd15th63rd21st71st422nd20th51st59th23rd52nd32nd21st33rd13th85th81st32nd269th22nd18th13th174th99th43rd1st8th47th18th18th29th11th21st15th
    Evil Numbers (Long)
    13th7th6th23rd 13th27th78th80th 16th 33rd32nd25th31st14th 19th 19th 45th42nd 43rd10th39th 65th161st 32nd52nd 40th25th15th27th29th44th46th21st162nd20th15th 63rd64th 4th10th25th19th 19th10th18th
    Factorial Factorisation
    7th2nd 15th 3rd
    Farey Sequence
    4th
    Fibonacci
    91st13th6th62nd53rd39th101st317th153rd32nd33rd43rd66th84th79th79th75th41st16th73rd38th45th71st26th212th80th 204th10th64th41st88th214th26th120th61st47th219th89th40th26th40th225th183rd43rd186th64th24th35th267th249th40th5th65th106th23rd35th73rd43rd55th28th
    Fizz Buzz
    125th31st1st8th46th11th32nd557th58th 38th 56th79th78th75th66th 101st 49th79th 281st74th 61st77th61st 599th1st 39th53rd 47th106th55th18th9th1st366th49th209th69th19th 136th360th 8th95th176th49th 39th45th56th
    Foo Fizz Buzz Bar
    11th29th4th24th 79th127th98th 16th 24th23rd29th26th16th 17th 16th 62nd34th 48th10th18th 146th316th 40th29th 50th24th14th17th42nd75th89th20th859th27th31st 64th59th 5th24th23rd17th 20th11th21st
    Forsyth–Edwards Notation
    4th3rd 2nd
    Fractions
    12th4th 347th
    Game of Life
    3rd 13th 37th 74th 3rd
    Gijswijt’s Sequence
    7th 6th
    Happy Numbers
    16th24th5th19th 31st64th58th45th 34th 23rd25th20th23rd14th 21st 18th 74th36th 65th12th32nd 56th213th 28th40th 38th21st10th17th34th31st59th16th328th16th29th 85th37th 3rd9th22nd14th 21st6th17th
    Happy Numbers (Long)
    8th21st5th21st 21st71st41st37th 14th 21st23rd22nd21st12th 12th 16th 41st35th 40th10th26th 41st116th 24th39th 31st19th9th16th29th23rd31st11th376th18th19th 61st32nd 3rd6th16th14th 15th7th20th
    Hexdump
    3rd 34th
    Hilbert Curve
    5th 4th
    Intersection
    6th
    Inventory Sequence
    8th22nd11th16th 22nd46th33rd42nd 12th 19th20th17th18th9th 13th 11th 22nd18th 20th 13th 31st85th 17th22nd 24th21st10th14th24th22nd26th8th233rd14th14th 41st23rd 3rd6th9th12th 15th7th14th
    ISBN
    11th5th23rd 29th 23rd 10th 18th 222nd 5th
    Jacobi Symbol
    4th4th 69th
    Kaprekar Numbers
    4th 67th 3rd
    Kolakoski Constant
    8th6th6th15th 28th23rd18th22nd 23rd12th16th16th9th 19th 21st 20th21st 14th6th 33rd61st 15th7th 13th6th6th19th14th13th33rd8th143rd12th14th 36th12th 7th7th22nd9th 8th4th10th
    Kolakoski Sequence
    18th14th11th12th 34th58th34th35th 20th22nd18th17th8th 16th 16th 32nd20th 37th10th 39th122nd 21st30th 25th13th8th16th28th22nd30th10th311th13th14th 51st33rd 9th9th12th10th 14th9th18th
    Leap Years
    24th4th5th25th 31st57th154th73rd 23rd 36th41st33rd35th26th 38th 37th 82nd34th 93rd6th29th 168th476th 49th35th 94th49th19th9th10th127th137th23rd322nd28th9th 118th103rd 3rd33rd49th23rd 30th16th27th
    Levenshtein Distance
    7th3rd 118th 8th 14th
    Leyland Numbers
    7th6th5th12th 27th27th42nd29th 11th 18th14th15th14th13th 12th 11th 24th24th 39th8th27th 38th122nd 24th15th 27th12th8th10th18th22nd37th10th368th13th16th 52nd27th 6th15th11th10th 17th7th14th
    ln 2
    5th6th 230th 5th
    Look and Say
    9th11th4th15th11th30th37th41st36th16th15th15th 19th25th17th13th14th 12th15th 12th 29th25th 32nd7th 41st149th14th20th29th 33rd19th10th15th42nd35th31st10th118th15th21st 65th23rd 2nd7th9th11th 15th8th11th
    Lucky Numbers
    7th11th5th14th 20th40th29th27th 15th 19th15th16th15th10th 10th 11th 66th23rd 29th8th12th 26th87th 13th19th 20th16th7th12th18th17th25th6th245th16th11th 32nd22nd 2nd6th10th9th 13th6th9th
    Lucky Tickets
    5th 2nd
    Mahjong
    2nd
    Mandelbrot
    2nd 2nd
    Maze
    4th 6th 1st
    Medal Tally
    2nd 4th
    Minesweeper
    💎 3rd
    Morse Decoder
    6th 7th
    Morse Encoder
    5th8th
    Musical Chords
    4th 25th38th11th 16th
    N Queens
    5th 94th 6th
    Niven Numbers
    22nd11th5th27th27th31st81st109th48th29th25th34th54th27th38th34th39th24th 30th26th24th27th 62nd45th 86th12th41st33rd103rd353rd22nd52nd51st 71st38th21st33rd25th71st77th20th39th23rd1st14th123rd67th 3rd20th41st22nd16th31st14th28th
    Niven Numbers (Long)
    9th19th5th23rd 13th39th65th67th 16th 21st28th23rd27th19th 22nd 17th 41st39th 36th7th22nd 60th146th 33rd44th 47th28th15th25th30th41st43rd18th468th21st30th 68th41st 7th14th26th19th 19th9th22nd
    Number Spiral
    6th10th6th13th 30th50th33rd27th 21st10th20th17th10th 12th 9th 23rd20th 14th8th30th 31st84th 9th31st 19th16th5th8th13th17th23rd6th191st11th12th 35th15th 3rd5th7th7th 13th6th9th
    Odious Numbers
    22nd17th6th26th 30th51st94th47th 33rd 42nd38th30th32nd16th 28th24th 26th 67th43rd 72nd14th55th25th97th327th 43rd57th 52nd32nd13th35th15th75th77th22nd153rd24th18th 129th77th 1st9th39th16th 27th10th20th
    Odious Numbers (Long)
    11th15th5th23rd 19th60th66th50th 16th 33rd29th23rd30th14th 18th 18th 42nd41st 38th8th35th 60th134th 32nd52nd 44th25th13th27th29th40th43rd21st109th22nd15th 57th49th 5th10th25th18th 19th9th18th
    Ordinal Numbers
    10th3rd 1st
    PalindromemordnilaP
    💎 45th 4th
    Pangram Grep
    4th2nd 38th 21st 65th 235th 47th 28th 556th 19th 1st30th41st
    Partition Numbers
    6th 5th
    Pascal’s Triangle
    9th14th4th18th 32nd76th62nd40th 15th 27th21st17th20th14th 18th 13th 44th27th 64th12th61st 52nd221st 34th39th 47th21st14th81st42nd50th47th12th86th22nd20th 94th52nd 10th12th25th12th 19th9th17th
    Pernicious Numbers
    15th24th19th27th 31st65th67th56th 32nd 32nd38th29th33rd22nd 28th 24th 54th37th 51st11th51st 64th187th 37th42nd 49th36th17th33rd42nd49th61st20th94th21st32nd 111th61st 4th13th36th21st 28th9th26th
    Pernicious Numbers (Long)
    7th16th5th16th 14th31st38th29th 11th 22nd24th21st20th14th 14th 14th 27th21st 21st 36th 44th83rd 23rd35th 23rd22nd12th20th14th24th26th13th118th14th16th 50th33rd 2nd8th17th11th 14th6th11th
    Poker
    5th4th5th
    Polyominoes
    3rd
    Prime Numbers
    29th16th5th29th 28th33rd118th50th 34th 23rd32nd27th37th17th 31st 19th 77th20th 115th13th1st 140th434th 58th56th 96th39th12th9th28th71st90th26th133rd26th19th 62nd87th 1st6th47th12th 29th11th26th
    Prime Numbers (Long)
    17th24th5th25th 17th56th81st47th 16th 20th30th27th32nd16th 21st 21st 49th5th 61st12th1st 41st188th 40th50th 49th28th15th19th11th47th37th21st51st26th24th 85th69th 2nd10th31st13th 20th10th26th
    Proximity Grid
    3rd
    QR Decoder
    5th 98th
    Quine
    1st6th1st 137th60th 107th 95th 50th 25th 1st 32nd13th5th 287th 85th 1st22nd1st26th1st36th 72nd4th14th 83rd16th 26th1st 25th 15th
    Recamán
    12th15th8th14th 16th63rd48th47th 15th 23rd20th15th16th11th 12th 13th 30th19th 31st9th22nd 42nd136th 22nd22nd 34th20th9th17th22nd26th36th12th422nd16th17th 53rd38th 4th6th12th10th 18th9th17th
    Repeating Decimals
    5th 109th
    Reverse Polish Notation
    8th5th
    Reversi
    2nd 7th
    Rijndael S-box
    4th 55th 2nd
    Rock-paper-scissors-Spock-lizard
    8th 29th
    Roman to Arabic
    10th8th 31st 13th 3rd 13th
    ROT13
    2nd 4th
    Rule 110
    5th4th4th12th 20th39th38th21st 19th21st16th11th7th 14th 26th18th 27th8th16th 35th109th 19th22nd 30th16th9th11th15th17th32nd10th70th10th14th 49th28th 6th10th9th11th 8th10th
    Scrambled Sort
    2nd 12th 134th
    Set
    2nd
    Seven Segment
    4th
    SI Units
    3rd 9th 5th
    Sierpiński Triangle
    7th12th5th16th 19th49th39th23rd 20th21st18th17th11th 17th 12th 33rd19th 32nd9th21st 42nd136th 26th15th 35th22nd9th15th29th26th43rd9th331st14th13th 50th34th 16th12th16th10th 17th7th15th
    Smith Numbers
    8th10th6th15th 26th39th34th31st 12th 16th15th15th16th8th 10th 10th 22nd15th 21st8th18th 34th75th 16th16th 16th17th9th13th15th17th18th10th114th12th12th 47th22nd 8th4th11th9th 12th6th11th
    Spelling Numbers
    5th 110th 4th
    Star Wars GPT
    2nd 87th
    Star Wars Opening Crawl
    5th
    Sudoku
    3rd 64th
    Sudoku (Fill-in)
    2nd 71st
    Ten-pin Bowling
    4th 12th
    Tic-tac-toe
    3rd 73rd 12th
    Time Distance
    5th
    Tongue-twisters
    11th9th8th14th 36th49th53rd42nd 19th 22nd20th17th17th15th 16th 13th 34th20th 18th11th16th 51st188th 19th12th 36th20th9th15th26th26th54th9th381st14th21st 51st30th 10th24th13th12th 19th7th12th
    Topological Sort
    🦄 6th
    Tower of Hanoi
    9th 19th10th27th24th 14th 15th 17th19th 20th
    Transpose Sentence
    2nd 102nd 5th
    Trinomial Triangle
    2nd
    United States
    6th 25th 7th
    Vampire Numbers
    11th7th3rd13th 26th38th37th27th 19th 16th14th11th10th7th 10th 10th 27th14th 18th9th16th 34th81st 13th10th 22nd16th5th9th10th9th25th10th233rd10th8th 44th19th 6th6th8th7th 12th5th8th
    Van Eck Sequence
    8th16th10th15th 24th51st41st39th 16th 19th16th17th18th8th 12th 11th 28th23rd 22nd8th26th 36th105th 20th26th 25th19th9th15th 23rd26th10th 15th15th 48th29th 8th8th13th10th 15th9th17th
    Zeckendorf Representation
    4th 88th
    Zodiac Signs
    5th3rd 12th 82nd
    γ
    4th 4th
    λ
    12th4th5th17th 47th35th24th25th 9th 32nd12th18th20th9th 26th 25th 32nd25th 15th10th 40th100th 20th8th 17th12th7th28th12th16th44th9th152nd15th15th 34th18th 7th12th30th8th6th10th6th11th
    π
    14th9th7th9th 63rd63rd48th32nd 39th15th23rd22nd11th 28th 30th 48th35th 32nd11th 83rd214th 91st9th 20th11th6th22nd52nd19th66th11th470th18th21st 80th20th 6th14th14th10th7th9th6th9th
    τ
    13th6th6th7th 44th31st29th24th 33rd13th20th18th11th 22nd 19th 37th26th 19th10th 51st112th 77th9th 15th8th6th19th41st15th43rd10th277th15th22nd 54th15th 6th9th8th10th6th9th6th9th
    φ
    13th7th5th7th 41st27th29th22nd 42nd15th22nd21st11th 22nd 21st 45th33rd 30th9th 47th94th 73rd8th 23rd7th6th19th39th17th40th14th353rd14th26th 63rd18th 6th9th10th11th6th12th6th10th
    √2
    20th5th8th16th 41st32nd36th24th 35th15th23rd23rd11th 27th 22nd 52nd28th 50th9th 70th107th 61st7th 14th7th6th20th38th13th47th14th515th8th20th 60th16th 6th10th34th11th6th14th6th9th16th
    𝑒
    14th12th10th8th 54th52nd35th36th 36th15th27th23rd13th 25th 26th 43rd30th 33rd12th 52nd113th 74th12th 38th11th5th27th41st54th48th13th401st36th15th 88th24th 6th8th12th11th6th11th7th12th20th