Vishwakarma Puja is a festival in the honour Lord Vishwakarma, a Hindu god, who is considered to be the divine architect. One must pray and do the puja of the arms, instruments and weapons to gratify Lord Vishwakarma. You can also send out Vishwakarma Puja wishes and messages to your family and friends on the festival day, celebrated annually on September 17 and by certain sects during Diwali festival.1