necessary because of 24:00 end of day labeling

def strptime(string, timezone=0):
    """necessary because of 24:00 end of day labeling"""
    year = int(string[0:4])
    month = int(string[5:7])
    day = int(string[8:10])
    hour = int(string[-5:-3])
    minute = int(string[-2:])
    ts = datetime.datetime(year, month, day) + \
        datetime.timedelta(hours=hour, minutes=minute) - \
        datetime.timedelta(hours=timezone)
    return ts