Sometimes i feels sadness without any reason

This situation seems quite abnormal but whatever i'm sharing is already happened with me hundred times, also felt by others. I don't know any specific word for this situation. Normally whenever we were sad we mostly have a reason that became us sad. But without any reason, like in normal life you were doing usual things and accidentally feels sadness. This thing sucks and totally changes the mood. I saw a friend crying without any reason on Friday, so that i said him there is nothing to worry. If you have faced this situation you can share your review. Life is too short to live with sadness. 

Navratri - ( Tomorrowland for Gujarati prople ) has been started

Navratri is one of spiritual festival of Gujarat. The duration is not for only one day but it's for 9 days. In this prople pray to goddess for his/her wishes, blessing, ... etc. At night prople dance on the traditional rhythms, they call it " Garba ". It's very famuous dance of india. And gujarat people are also well known for that. There are many more types of dances included in garba. That's all.