Meaning & origin of word 'Oṇam':
'Oṇam' comes from Sanskrit śroṇā(श्रोण).
According to Hinduism, śroṇā/śravaṇā/(श्रोण/श्रवण) is birth Nakshatra of Vishnu(श्रोणम् > ओणम्)
Bhāgavata Purāṇa (8.18) says Vishnu took birth on Shravana Dvadashi.
This is exact date of Onam
Reclaiming Onam:
Marxist-Evangelist nexus has Hijacked the Onam narrative. They have declared that Onam is not Hindu festival.
In this thread, I explore the origins of Onam.
Evidence clearly shows that Onam is nothing but Vamana Jayanti celebrating the birth of God Vishnu From - https://twitter.com/BharadwajAgain/status/1567906821020733440?t=C5Hl8AXioG5DtHc8MwYJOw&s=19 (copied to keep it antiqued)