accuracy of days outside US?

[whackybob]

trying to fill out N400. How accurate does the days spent outside of US need to be? I only have US entry dates on my passport. I only had 2-week long
vacation outside of US every year.
If it has to be 100% accurate, where can I find out these information?
I don't have the plane tickets, etc.

[JayanthN]

Accuracy of time away matters a lot when you are on the borderline case of 180 day rule. For trips as short as yours it should not matter a great deal.

You can arrive at the number of days using arrival/departure stamps on your passport in the foreign country. Count only the whole days you were away. You do not count the days your departed from or arrived in US.