My English grammar book (English Grammar, David Daniels & Barbara Daniels) describes the perfect tenses as follows:
The perfect tenses are used to describe how an event in the present, past or future continues to be relevant at a later time.
When I say when I was born, in English I use the past tense, as I have done in this sentence too. I don't use a perfect tense. In Italian I would use the passato prossimo, which this section of the Italian Wikipedia article about passato prossimo considers equivalent to the present perfect.
Which tense should I use for a past event that it is still relevant at the present time?