Answer:
The answer is anomie.
Step-by-step explanation:
Émile Durkheim called "anomie" to the lack of social guidance about the norms in a community. In the example, Juan's mother has not been exposed to new customs about birthdays. If a person has different beliefs or values to those prominent in his environment, and anomie takes place, it's possible that the person will not function properly in society.
According to Durkheim, anomie mostly occurs due to a different perspective of values between a person and those of a larger population.