new Date(new Date().getTime()-25 * 24 * 60 * 60 * 1000) got unexpected date

Question

I would like to generate a list of dates, but found out the date is wrong start from - 25 * 24 * 60 * 60 * 1000

My local date is 2016-07-17. I got

2016-         


        

Answer 1

Integer overflow.

Multiplying 25 * 24 * 60 * 60 * 1000 results in 2160000000 which is more than what fits in an integer.