Raksha Bandhan (Hindu holiday)

Raksha Bandhan is a popular, traditionally Hindu, annual rite, or ceremony, which is central to a festival of the same name. On this day, sisters of all ages tie a talisman, or amulet, called the Rakhi, around the wrists of their brothers, symbolically protecting them, receiving a gift in return, and traditionally investing the brothers with a share of the responsibility of their potential care. Source: Wikipedia