100 days

From and including: Friday, July 11, 2008
To and including: Saturday, October 18, 2008

It is 100 days from the start date to the end date, end date included

Or 3 months, 8 days including the end date

Alternative time units
100 days can be converted to one of these units:
8,640,000 seconds
144,000 minutes
2400 hours
14 weeks (rounded down)