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

    fkantelberg

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    12 Days of Christmas
    463rd
    99 Bottles of Beer
    418th
    Abundant Numbers
    351st
    Abundant Numbers (Long)
    165th
    Arabic to Roman
    546th
    Arithmetic Numbers
    43rd
    Arrows
    191st
    Ascending Primes
    490th
    ASCII Table
    400th
    brainfuck
    265th
    Card Number Validation
    269th
    Catalan Numbers
    550th
    Catalan’s Constant
    290th
    Christmas Trees
    652nd
    Collatz
    2,748th687th1,816th 542nd
    CSS Colors
    455th
    Cubes
    321st
    Day of Week
    874th
    Diamonds
    448th
    Divisors
    35th
    Emirp Numbers
    929th
    Emirp Numbers (Long)
    730th
    Emojify
    502nd
    Evil Numbers
    226th
    Evil Numbers (Long)
    115th
    Factorial Factorisation
    267th
    Farey Sequence
    615th
    Fibonacci
    7,931st7,264th4,027th4,774th5,729th3,740th7,498th5,639th 5,480th1,177th8,635th5,274th
    Fizz Buzz
    783rd
    Foo Fizz Buzz Bar
    24th
    Forsyth–Edwards Notation
    321st
    Fractions
    480th
    Gijswijt’s Sequence
    489th
    Happy Numbers
    6th
    Happy Numbers (Long)
    889th
    Hexdump
    181st
    Intersection
    170th
    Inventory Sequence
    826th
    ISBN
    1,084th
    Jacobi Symbol
    223rd
    Kaprekar Numbers
    567th
    Kolakoski Constant
    208th
    Kolakoski Sequence
    145th
    Leap Years
    1,505th 3,450th
    Levenshtein Distance
    577th
    Leyland Numbers
    743rd
    ln 2
    250th
    Lucky Numbers
    707th
    Lucky Tickets
    515th
    Mandelbrot
    244th
    Medal Tally
    499th
    Niven Numbers
    1,769th
    Niven Numbers (Long)
    548th
    Odious Numbers
    191st
    Odious Numbers (Long)
    161st
    Ordinal Numbers
    1,581st 233rd 2nd
    Pangram Grep
    126th
    Partition Numbers
    469th
    Pascal’s Triangle
    91st
    Pernicious Numbers
    1,374th
    Pernicious Numbers (Long)
    571st
    Prime Numbers
    1,955th 757th
    Prime Numbers (Long)
    211th
    Proximity Grid
    362nd
    Quine
    551st
    Repeating Decimals
    424th
    Reverse Polish Notation
    241st
    Seven Segment
    911th
    Time Distance
    223rd
    United States
    674th
    Van Eck Sequence
    698th
    Zodiac Signs
    304th
    π
    330th
    τ
    391st
    φ
    372nd
    √2
    519th
    𝑒
    484th