In some countries (or individual companies) this is done in another way - the annual salary is split into 13 or 14 parts, and the 13th is given around Christmas

In some countries (or individual companies) this is done in another way - the annual salary is split into 13 or 14 parts, and the 13th is given around Christmas period and 14th around summer holidays. But it's not considered bonus, it's considered part of the salary and it's guaranteed.