How do you calculate the validity of an ACTV + Aerobus public transport ticket with a duration of 12/24/36/48/72 hours or 7 days?

The ticket’s validity starts from the exact moment – hour and minutes – it is collected at the desk of one of the //venice>connected points or by means of a ticket machine and ceases at the duration expiry, after 12/24/36/48/72 hours or 7 days. The trip to/from Marco Polo Airport is included in the limited time ticket and cannot be separated.