Is it possible to have the times on the calendar match

Hello,

Is it possible to have the times on the calendar match the actual appointment lengths? Time base is set for 75 minutes plus 15 minutes padding. The calendar gives the clients the impression that the appointments are 90 minutes in length.

Desired Example:
9:00am - 10:15am
10:30am - 11:15 am
11:30am - 12:15pm
12:30pm - 1:15pm etc...

Page:
http://m40.siteground.biz/~heartcor/islandrolfing.com/book-a-session/

Cheers,
Casper