Difference Between Malaysia Day & Independence Day

Most of us always confuse between these 2 days though the gap is 16 days.

Malaysia Day (16 Sept):
Formation of Malaysia (previously known as Malaya) where Sabah and Sarawak joined Malaysia and Singapore went on their own.

Merdeka (31 Aug):
It's the date that British went out from the country and we are on our own. But this applies only to Peninsular Malaysia and Singapore as Sabah & Sarawak was still partial administrative of Philipines and Indonesia. That's where Merdeka is not celebrated in Sabah & Sarawak on 31 Aug till today.