added Zellers Congruence

[mrvnmchm]

No description provided.

[mrvnmchm]

Updated to add arguments and help page. Let me know of any other improvements I can make. 👍

mrvnmchm@M3-Q-X70-A:/some_folder/AllAlg/python$ python math/zellers_birthday.py --help
usage: zellers_birthday.py [-h] bday

Find out what day of the week you were born on Accepts birthday as a string in
mm-dd-yyyy or mm/dd/yyyy format

positional arguments:
  bday        Date as a string (mm-dd-yyyy or mm/dd/yyyy)

optional arguments:
  -h, --help  show this help message and exit
mrvnmchm@M3-Q-X70-A:/some_folder/AllAlg/python$ python math/zellers_birthday.py '01/04/1989'
Your birthday 01/04/1989, was a Wednesday!

>>> import zellers_birthday as z
>>> z.zeller('10/10/2018')
Your birthday 10/10/2018, was a Wednesday!
>>> z.zeller('04-23-1991')
Your birthday 04-23-1991, was a Tuesday!
>>> z.zeller('01-31-1976')
Your birthday 01-31-1976, was a Saturday!

[abranhe]

Thanks so much for your contribution to The All ▲lgorithms Project. Without people like you submitting Pull Requests we couldn't run this project. You rock @mrvnmchm

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