Initial introductions with Spaniards are always formal: extend a brief but firm handshake, while maintaining eye contact and saying buenos días, buenas tardes or buenas noches depending on the time of day.
Men will continue to shake hands on all subsequent occasions. Women will embrace and kiss; you may also observe professional women greeting particularly close [male] colleagues in this way. In the company of friends, it is also common for men to hug or pat each other on the back as well as shaking hands.

Eating timetable is quite special in Spain.
Bars open at 7am, often earlier. Most people has a light breakfast (café) at 8-10 and doesn’t eat anything else until lunch.
Restaurants tend to start their menú del día at about 2pm. Most people has lunch between 2 and 3 pm, but you may still get something as late as 4pm.
No one in Spain goes out to eat any earlier than 9pm in the evenings. Most restaurants will continue serving until approaching midnight, some later.

The Spanish attitude towards time is notoriously flexible. Nothing is done in a hurry but whatever needs doing gets done. If you have an appointment with a Spaniard don’t expect him to arrive on time, although being more than 15 minutes late is considered bad manners. If you’re going to be more than 15 minutes late for an appointment you should telephone and apologise.

Family surnames are often confusing to foreigners, as the Spanish have two surnames, the first being their father’s and the second their mother’s. Spanish children are usually named after a saint and a person’s saint’s day (santo) is as important a celebration as their birthday (cumpleaños), both of which are occasions on which it is traditional to entertain your family and friends.