May 15, 1948 to May 15, 2017 = 69 years

From and including: Monday, May 17, 1948
To, but not including Monday, May 15, 2017

Result: 25,200 days
It is 25,200 days from the start date to the end date, but not including the end date.


Just an added note

Most of all counts given to me was given on a Sunday and the start of the count would be a Monday

like

May 15, 2017 to Oct 26, 2020

From and including: Monday, May 15, 2017
To, but not including Monday, October 26, 2020

Result: 1260 days


May 15, 2017 to April 8, 2024 = 2520 days

From and including: Monday, May 15, 2017
To, but not including Monday, April 8, 2024

Result: 2520 days

From and including: Monday, May 17, 1948
To, but not including Monday, May 15, 2017

Result: 25,200 days
It is 25,200 days from the start date to the end date, but not including the end date.

2520 days

25,200 days

2520 / 7 = 360

25,200 / 360 = 70


just numbers