I just knew that it was Peter and Paul's day and just wanted to wish a happy name day to all my brothers and sisters out there.
The feast is observed in Rome because St. Paul and St. Peter are patron saints of the eternal city. It is also a public holiday of the Canton of Ticino, Switzerland, as well as parts of the Swiss cantons of Lucerne and Graubünden. It is a public holyday in Malta.
https://en.wikipedia.org/wiki/Feast_of_Saints_Peter_and_Paul#Public_holiday