import re


def is_valid_date(date_string):
    """
    Validate if the passed date string has format "YYYY-MM-DD"
    """
    regex = re.compile(r"(2[0-9]\d\d)[-](0[1-9]|1[012])[-](0[1-9]|[12][0-9]|3[01])")
    match = regex.match(str(date_string))
    return bool(match)