How to capitalize month

[caneta]

With the italian locale it-IT, I use {{formatDate date "long"}} to print my dates.
In this way, months are printed with the first letter lowercase but I would like to have them capitalized like in the english locale en-EN (by the way, why this difference?).
So I would like to get 12 Settembre 2016 instead of 12 settembre 2016.
Is that possible?
Thank you.