Uderolal is said to have been born on the first day of the Chaitra month. Which is considered the first day of our new year. In the ancient times March was considered the first month. We Sindhis have Cheti Chand (First day of Chaitrra) as our New Year Day.

Maharashtrians call their New Year day Gudi Parva, and start their New Year. It is usual for people all over the world to connect an auspicious day with some great event. Shri Rama started war with Ravana on Vijay Dashmi day. This day was being already celebrated by us. After rainy season we would clean our houses and decorate them.
Shri Rama chose this day to enter Ayodhya. Similiarly we too consider Cheti Chand as the birthday of our Udero. Thus doubly important for us.