from datetime import datetime


def get_start_next_month(date):
    """
    Parameters
    ----------
    date: datetime.datetime

    Returns
    -------
    datetime.datetime
        date of the start of the next month
    """
    if date.month+1 <= 12:
        return datetime(date.year,date.month+1,1)  
    return datetime(date.year+1,1,1)