Utthana Dwadashi is celebrated in Karthika month on twelfth day after new moon ( shukla paksha dwadashi ).
On this day Lord Vishnu married Tulsi Maa. She is called Vrinda
It is believed that those who perform this Puja get Punya of kanya dhan.
Story ( Katha )
Vrinda was the daughter of Jaladhar , a king. He antagonised all Gods since he had a boon that he would be all powerful till Vrinda got married. Lord Vishnu disguised Himself as her husband. She became angry and turned him into Saligram . He turned her into Tulsi plant. Lord Vishnu was very impressed with Vrinda and promised to marry her every year on Karthik month shukla paksha dwadashi. This festival is called Tulsi Vivah or Utthana Dwadasi .
Try this traditional Puja room rangoli for the festival
Place 4 dots in eight directions
A simple rangoli for this festival ( also called Tulsi Vivah )