Bhaum Vrat is observed on Tuesdays or on Mangalvar in Shravan month. Bhauma or Mangal or Mars is the Navgraha
worshipped in Hinduism. The popular belief is that Shiva has control over all
navgrahas especially Bhauma.
The belief is that those having trouble in horoscope related
to Mangal Grah will get relief by observing Bhaum Vrat in Shravan Month
dedicated to Shiva on the day.
The main ritual on the day includes offering prayers at a
Shiva temple. People opt only for vegetarian dish on the day. Evening prayers
are offered to Shiva and Mangal Grah (you can find Mangal deity in any temple
that has Navgrahas installed).
Red color flowers are offered for puja on the day.
It is meritorious to perform Annadanam (food donation) on
the day.