Q. How many holidays are there in total?

Thank you for your question!

The exact amount of holidays around the world is always changing, especially when you take into account the types of holidays countries observe, such as public holidays and religious holidays. Here are a couple of websites that will give you an idea of what holidays and observances are celebrated by various countries, religions or sects:

An article from the Telegraph: http://www.telegraph.co.uk/travel/maps-and-graphics/mapped-the-countries-that-have-the-most-bank-holidays/

Holidays and Observances Around the World http://www.timeanddate.com/holidays/

A list of holidays that will give you an idea of different holidays observed by different religions or sects: https://en.wikipedia.org/wiki/Lists_of_holidays