Number of days after 10th February and before 20th June:
February = 19 days (29 - 10) (2020 is a leap year)
March = 31 days
April = 30 days
May = 31 days
June = 19 days
So, total number of days between 10th February and 20th June is given by 19 + 31 + 30 + 31 + 19 = 130 days.