def earliest_possible_date():
 today = pd.Timestamp('now', tz='UTC').normalize()
 return today.replace(year=(today.year - 10))

def earliest_possible_date ( ) : today = pd . Timestamp ( 'now' , tz = 'UTC' ) . normalize ( ) return today . replace ( year = ( today . year - 10 ) )
the earliest date for which we can load data from this module .