Commemorations and celebrations

Festivals and celebrations are held throughout the year and in each different country, because every country national dates (specific to each country), dates commemorative events have also happened in each country, folk festivals that are held They include facts and own events of popular culture and religious commemorations.
So and so most celebrations are very special commemorations of each country. 
Festivals and commemorations world, are rather few I such as May Day, Labor Day to commemorate (and even then, some countries have different dates for this celebration).