Not sure that I understand what does that mean that a word "has a date", but anyway, supposing that the Julian calendar is in place, that would be accurate subject to a few days for the times in question.
I mean that if a guy living in 16th century believed that he lived in 1588, he was not mistaken.
I mean that if a guy living in 16th century believed that he lived in 1588, he was not mistaken.