In Spain, the legal drinking age is 18. This means that it is illegal for anyone under the age of 18 to purchase or consume alcohol in public places, such as bars, restaurants, and nightclubs. However, there are some exceptions to this rule.

Firstly, it is legal for minors to consume alcohol in private residences or at family gatherings with the permission of their parents or legal guardians. This means that parents or guardians can allow their 13-year-old child to have a small glass of wine or beer with a meal at home, for example.
Additionally, there are some regional and cultural traditions in Spain that involve minors consuming alcohol. For example, in the Basque Country and Navarra, it is common for teenagers to participate in a tradition called txikiteo, where they go from bar to bar drinking small glasses of wine or beer with their parents or older family members. This tradition is generally accepted as a cultural practice, but it is not legal for minors to consume alcohol in public places outside of these specific circumstances.
It is worth noting that while there may be some cultural acceptance of minors consuming alcohol in certain contexts, the Spanish government takes underage drinking very seriously. The penalties for serving alcohol to minors or for minors caught drinking in public places can be severe, including fines and even jail time for adults who facilitate underage drinking.
The legal drinking age in Spain is in line with the majority of countries in the European Union, where the legal age for purchasing and consuming alcohol ranges from 16 to 18 years old. However, enforcement of these laws can vary across countries and cultures. In some countries, such as Germany, it is legal for minors to consume beer and wine in public places with the consent of their parents or legal guardians. In other countries, such as the United Kingdom, it is illegal for anyone under the age of 18 to consume alcohol in public or private places, even with parental consent.
In recent years, there has been increasing concern over underage drinking in Spain, particularly among teenagers and young adults. According to a survey by the Spanish Society of Family and Community Medicine, over 70% of young people between the ages of 14 and 18 reported having consumed alcohol in the past month. This has led to calls for stricter enforcement of underage drinking laws and for greater education and awareness campaigns around the risks of alcohol consumption.
In conclusion, while it may be legal for minors to consume alcohol in certain contexts in Spain, such as in private residences or as part of cultural traditions, the legal drinking age in public places is 18. The Spanish government takes underage drinking very seriously and enforces penalties for adults who facilitate underage drinking or for minors caught consuming alcohol in public places. It is important for parents and guardians to be aware of the risks associated with underage drinking and to act responsibly in allowing their children to consume alcohol in any context.