<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def convert_date(date):
 """Convert string to datetime object."""

    date = convert_month(date, shorten=False)
    clean_string = convert_string(date)
    return datetime.strptime(clean_string, DATE_FMT.replace('-',''))