Maha-Vishnu is Adi Purush or Adi Mool, the first cause of this universe in the sense of passive proximity,
Counterpart of her strength and power is Maya so called Maha-Laxmi, she is inseparable truth of Lord Sri Hari Vishnu,
Heat may be separated from fire but but Maha-Laxmi cannot from Maha-Vishnu,
Maha_Laxmi Pujan is performed in the favorite month of Lord Sri Hari Vishnu that exactly in the mid span so called new moon or Sri Amavasya, Though story relates to return of Lord Rama, an incarnation of Lord Sri Hari Vishnu from his exile yet the day is designated for worship of his power,
Wealth seeker needs to serve the Lotus feet of lord Sri Hari Vishnu to attain wealth-presiding deity of wealth is Maha-Laxmi, which never separates in any form from Sri Hari Vishnu and bless the devotees of Lord,
May Lord bless all,
Thanks Please