Can I park in a blue zone space outside metered hours, i.e. at night?

Yes, the blue zone can be used outside metered hours.

Can a blue zone ticket be used in any town?
Yes.

How many 30-minute tickets can I get per day?
You can get one 30-minute ticket per day in each town.

Who can use the free 30-minute ticket?
Anyone can use the free 30-minute ticket, resident or not.

Can I park for more than 30 minutes in a 30-minute parking space outside metered hours?
Yes, 30-minute parking spaces can be used longer provided it is outside metered hours.

Do I need to obtain a ticket to park a motorcycle?
No, motorcycle can be parked free of charge in any motorcycle parking area.

Can I park an ATV in a blue zone space?
No, ATVs may not be parked in blue zone spaces. From 01/04 to 31/10 These vehicles are restricted due to the damage they do to local roads, especially unpaved ones (the local standard).
 https://formentera.eco/en/frequently-asked-questions