def METHOD_NAME(timezone, dayobs):
    # Gets next midnight relative to date of observation
    midnight_at_site = datetime.strptime(dayobs, '%Y%m%d') + timedelta(hours=24 - timezone)
    min_date = midnight_at_site - timedelta(days=0.5)
    max_date = midnight_at_site + timedelta(days=0.5)
    return min_date.strftime(TIMESTAMP_FORMAT), max_date.strftime(TIMESTAMP_FORMAT)