Interestingly, it turns out that July and August each have 31 days for a reason. Because of them, February ends up being the exception, and it’s not just because July and August are the only months named after Roman emperors (Julius Caesar and Augustus), and politically, it would have been quite incorrect to make one of them 30 days long, leaving the other with 31 days.
Another interesting fact is that in Rome there was a tradition to give personal names to only the first four sons, while subsequent ones could be named with ordinal numerals: Quintus — “fifth,” Sextus — “sixth,” Septimus — “seventh,” Octavus — “eighth,” Nonus — “ninth,” and Decimus — “tenth.”
Naming conventions there were quite complicated all in all. Google “Roman names” on Wikipedia.
Hi, I'm Rauf Aliev. 