Need a pass for five days in Switzerland. Will be using pass days 1, 2, 3 and 5. Will the 4 day saver pass work?
Saver Passes are for consecutive days. You'll need a "Flex" Saver Pass for your dilemma. Actually, many travelers come out ahead monetarily by purchasing the Half Fare Card. Then every trip you make is discounted 50%. It actually gets you a larger discount on the Jungfrau journey (if you intend to do that) than other Swiss Pass product.
http://www.myswitzerland.com/en-us/swiss-flexi-pass-en.html
http://www.myswitzerland.com/en-us/transport-travel/tickets/swiss-half-fare-card-en.html