In our system, one “day” equates to 24 hours of usage.  So, if you make your first redemption in the afternoon on 1-Day Pass, you will have exactly 24 hours from that time to continue using your pass at other locations.  This rule is true for any of our time duration passports.  The clock starts after your first redemption, and your pass will expire after the number of hours associated with the duration of your pass.