In the days when gods warred with the demons, the concert of Indra (the Puranic king of the heaven) tide a rakhi (a silken amulet) around his wrist, by virtue of which, it is said, the god won back his celestial abode from his enemies.
On this day, the sisters tie rakhi on the wrists of their brothers to protect them against evil influences. Many consider it a rare privilege to be chosen to act the part of brother to the girls who may tie rakhis on their wrists. This is also the day set apart for Brahmins to change their sacred thread (Janeu/ Yagyopaveet). In Bombay, it is an occasion for offering coconuts to the sea. Raksha Bandhan is celebrated in the month of July/ August.