Here is the python code to find the difference between the two dates.
Code -
import datetime
today_date = datetime.date.today() # Today's Date
date_obj = datetime.date(2021, 5, 21) # 21st May, 2021 - A Date Object
print(date_obj - today_date) # Output Days with Time
print((date_obj - today_date).days) # Will only output number of days