What is the significance of Devutthana Ekadashi?

Devutthana Ekadashi or Prabodhini Ekadashi marks the day in Kartik month when Lord Vishnu awakens from his four-month cosmic slumber during the rainy season. Auspicious ceremonies like weddings and housewarmings and new ventures officially resume on or after this day. The day coincides with Tulsi Vivah, the ceremonial wedding of Tulsi plant representing Goddess Lakshmi to Lord Vishnu.