Does "Ticket Mobilis Day" last for 24 hours from the time purchased or does it expire at midnight (12PM)?
Ticket Mobilis day ticket expires at midnight on the day of first usage, not on day of purchase. Ticket Mobilis tickets can be purchased on one day and then first used at any time in the future.
Example: buy Ticket Mobilis on Tuesday (ticket is not active until first used). Use Ticket Mobilis for first time on Wednesday at 11am (ticket is now active). Ticket Mobilis will expire at Wednesday midnight.