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"""
Geschrieben von D. Siefert am 02/05/2016
Funktion ermittelt den letzten Tag eines Monats
"""
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from time import gmtime, strftime
import datetime

    #####def START#####
    def get_last_day_of_the_month():
        """
        Returns an integer representing the last day of the month, given
        a year and a month.
        """

        # Algorithm: Take the first day of the next month, then count back
        # ward one day, that will be the last day of a given month. The
        # advantage of this algorithm is we don't have to determine the
        # leap year.

        y = int(strftime("%Y"))
        m = int(strftime("%m"))

        m += 1
        if m == 13:
            m = 1
            y += 1

        first_of_next_month = datetime.date(y, m, 1)
        last_of_this_month = first_of_next_month + datetime.timedelta(-1)
        return last_of_this_month.day
    #####def ENDE#####