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

    postie77

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    12 Days of Christmas
    471
    99 Bottles of Beer
    724
    Abundant Numbers
    707
    Abundant Numbers (Long)
    869
    Arabic to Roman
    550
    Arrows
    536
    ASCII Table
    774
    brainfuck
    624
    Catalan Numbers
    664
    Catalan’s Constant
    111
    Christmas Trees
    779
    Collatz
    924
    CSS Colors
    229
    Cubes
    668
    Day of Week
    851
    Diamonds
    642
    Divisors
    847
    Emirp Numbers
    301
    Emirp Numbers (Long)
    532
    Emojify
    537
    Evil Numbers
    728
    Evil Numbers (Long)
    610
    Fibonacci
    863
    Fizz Buzz
    893686566
    Foo Fizz Buzz Bar
    842
    Forsyth–Edwards Notation
    591
    Fractions
    675
    Game of Life
    293
    Hexdump
    681
    Intersection
    692
    Inventory Sequence
    708
    ISBN
    784
    Leap Years
    815
    Leyland Numbers
    661
    Look and Say
    609
    Maze
    340
    Medal Tally
    615
    Morse Decoder
    316
    Morse Encoder
    405
    Niven Numbers
    887
    Number Spiral
    605
    Odious Numbers
    704
    Odious Numbers (Long)
    615
    Ordinal Numbers
    733
    Pangram Grep
    750
    Pascal’s Triangle
    695
    Pernicious Numbers
    653
    Pernicious Numbers (Long)
    597
    Poker
    510
    Prime Numbers
    727
    Prime Numbers (Long)
    749
    Proximity Grid
    304
    QR Decoder
    601
    Quine
    847
    Recamán
    744
    Repeating Decimals
    712
    Reverse Polish Notation
    520
    Rijndael S-box
    483
    Rock-paper-scissors-Spock-lizard
    496
    Roman to Arabic
    482
    Rule 110
    391
    Seven Segment
    712
    SI Units
    693
    Sierpiński Triangle
    599
    Smith Numbers
    603
    Spelling Numbers
    599
    Star Wars Opening Crawl
    534
    Sudoku
    351
    Time Distance
    729
    Tongue-twisters
    435
    Transpose Sentence
    530
    United States
    213
    Zodiac Signs
    537
    λ
    173
    π
    443
    √2
    589
    𝑒
    761