(iso_year)
return fourth_jan - delta
The gregorian calendar date of the first day of the given ISO year.
    Stolen from https://stackoverflow.com/a/1700069/8207
The gregorian calendar date of the first day of the given ISO year.
    Stolen from https://stackoverflow.com/a/1700069/8207
The gregorian calendar date of the first day of the given ISO year . Stolen from https : // stackoverflow . com / a / 1700069 / 8207
def iso_year_start(iso_year):
    """
    The gregorian calendar date of the first day of the given ISO year.
    Stolen from https://stackoverflow.com/a/1700069/8207
    """
    fourth_jan = datetime(iso_year, 1, 4)
    delta = timedelta(fourth_jan.isoweekday() - 1)
    return fourth_jan - delta
def iso_year_start ( iso_year ) : fourth_jan = datetime ( iso_year , 1 , 4 ) delta = timedelta ( fourth_jan . isoweekday ( ) - 1 ) return fourth_jan - delta