National Sports Day is celebrated on

India marks a number of official National Days to honour individuals or milestones connected with a particular field, and many of these are fixed to that person's date of birth, observed each year with formal ceremonies, awards, and public events organised by the concerned government body.

National Sports Day is observed on 29 August, the birth anniversary of hockey legend Major Dhyan Chand (born 29 August 1905), regarded as one of the greatest players in the sport's history for his exceptional stick-work and the three Olympic gold medals he won with the Indian hockey team.

The other dates offered do not carry this designation:

• 25 August has no official national sporting observance attached to it.

• 30 August falls the day after the actual observance and carries no separate national designation.

• 31 August, the last day of the month, is likewise not assigned to this observance.

The same birth-anniversary convention underlies other Indian observances, such as Teachers' Day on 5 September (Dr. S. Radhakrishnan's birthday) and National Youth Day on 12 January (Swami Vivekananda's birthday), reinforcing 29 August as the date fixed for this one.