Origins of Saraswats and their Culture
As per Wikipedia - The Saraswats are a sub-group of Hindu Brahmins who trace their ancestry to the banks of the erstwhile river Saraswati, India.
Saraswat name is derived from either the river Saraswati or from spiritual leader, the sage Saraswat Muni (sage) who lived on the banks of Saraswati. Saraswat Brahmins were one of the Pancha Gawda Brahmin groups who lived north of the Vindhyas. They belonged to Smarta tradition and primarily worshiped the five deities: Shiva, Vishnu, Devi, Surya and Ganesha. Throughout the course of history, the Saraswat Brahmins have migrated largely to various parts of Northern, Western and Southern India.
Sarswats celebrate almost all festivals in Hinduism, and follow the Hindu lunar calendar (Panchang) that gives the days on which the fasts and festivals are to be observed.