def _find_weektime(datetime, time_type='min'):
    """
    Finds the minutes/seconds aways from midnight between Sunday and Monday.

    Parameters
    ----------
    datetime : datetime
        The date and time that needs to be converted.
    time_type : 'min' or 'sec'
        States whether the time difference should be specified in seconds or minutes.
    """

    if time_type == 'sec':
        return datetime.weekday() * 24 * 60 * 60 + datetime.hour * 60 * 60 + datetime.minute * 60 + datetime.second
    elif time_type == 'min':
        return datetime.weekday() * 24 * 60 + datetime.hour * 60 + datetime.minute
    else:
        raise ValueError("Invalid time type specified.")