There are many local festivals and holidays depending on the region. Semana Santa, Holy Week, is celebrated all over Spain during the last week of Lent.

It depends on where exactly you are talking about and the religious of the local people. If you are talking about India they have different holidays than those in Tibet etc. because of the local religious holidays.

The Roman government did not provide holidays. Holidays were religious festivals. The Romans had a great many such festivals.

No.

They celebrate all Federal Holidays and have 17 Official local holidays plus they take an extra week off for Carnival.