import time
from datetime import date, timedelta
from typing import List


def dates_between(start_date: date, end_date: date) -> List[date]:
    """Calculates list of dates.

    Returns list of dates between two boundaries

    Args:
        start_date: Start date.
        end_date: End date (not inclusive).

    Returns:
        A list of dates between two dates (end date is not inclusive).
    """
    if start_date == end_date:
        return [start_date]
    elif start_date > end_date:
        raise ValueError('End date ({0}) must be later than start date ({1})'.format(end_date, start_date))

    return [start_date + timedelta(days=x) for x in range(0, (end_date - start_date).days)]


def current_time_mills() -> int:
    """Returns current time in ms since the Epoch.

    Returns:
         current time in ms.
    """
    return int(round(time.time() * 1000))