Hanuman Vratam is observed on Margashirsh Shukla Trayodasi. As per Andhra Pradesh, Telangana, Karnataka, Maharashtra and Gujarat it falls on Margashira Shudda Trayodashi. This vrata is observed for good health and prosperity.
In 2016, Hanuman Vratham date is December 12.
During Hanumath vratam, Lord Hanuman is worshipped with Shodashopachar puja. Hanuman vrat katha is recited in puja and naivedyam is offered to the Lord. Hanuman Astottaram, Sundara kanda and some other Hanuman stotras are chanted as part of puja.
Performing Hanmad vrata keeps you healthy, free from all fears, psychological tensions and even successful in studies. It is observed by married couples, unmarried devotees, children and elder people.
Famous Hanuman temples in India where Hanuman vrata is performed with much gusto are – Sankat Mochan Hanuman temple in Varanasi, Jhaku temple in Shimla, Kondagattu Anjaneya swamy temple in Karimnagar district of Telangana and Surendrapuri Panchamukha Anjaneya swamy temple near Yadagirigutta in Telangana.
It is to note that in Tamil Nadu and Kerala, Hanuman Jayanthi is observed in Margazhi month.
As per Gujarat and Maharashtra calendars, Hanuman jayanti is celebrated on Chaitra Purnima, the full moon day in the month of Chaitra.
Andhra Pradesh and Karanataka people celebrate Hanuman Jayanthi on Vaishakha Krishna paksha Dashami.