Mudik

Mudik" is one of great moments or traditions in Indonesia. Mudik is the term for going home to your parents, family, or village. This tradition has a massive number of participants during Ramadhan and Syawal-Mont on the Islamic calendar which is based on mount rotation. This mount become a great moment to do "mudik" because in that mount there is a sacred moment for Moslem people to celebrate Ied Fitri. Indonesia has a large Moslems population, so that the goverment gives a long holiday to Indonesian people.  This holiday or time is used to greeting with family and friends and in this greeting they make apologies to each other.

I did not understand the sentences about mount rotation, so they might not be corrected properly.

Proper nouns are names of special people, places and things and must begin with a capital letter.

Some examples: Islamis, Indonesia, Moslem, Ied Fitri.

massive crowd

massive surge

massive traffic jams

A massive person is a big, tall, huge person.

massive participants would be very large people who are participating.