Create a Python program to generate an ISO8601-compliant string from a given date
Date: 2020-07-15
from datetime import datetime

date_str = '2020-07-15'
date = datetime.strptime(date_str, '%Y-%m-%d')
iso8601_str = date.isoformat()

print(iso8601_str)
# Output: 2020-07-15T00:00:00