The first one is celebrated after the festival of colors, ( Holi (Holika), is the colourful Hindu festival celebrated on Falgun Purnima ) Holi, and another and important one after ( Diwali (Deepavali), the festival of lights ) Diwali.
On Bhai Dhooj, sister applies Teeka / tika/ tilak and displays her love giving sweets and other eatables. Brothers give gifts or presentations to their sisters. Bhai Dooj is also spelt as Bhai Duj / Bhai Dhuj/ BhaiDuj / BhaiDhuj.