Many people throughout India and overseas celebrate India's Republic Day on January 26 each year. India became independent of the UK on August 15, 1947. India did not have a permanent constitution at that time. India's Constitution came into effect on Republic Day, January 26, 1950. This date was chosen as it was the anniversary of Purna Swaraj "complete self-rule" Day, which was held on January 26, 1930.
On every January 26, large military parades are held in New Delhi and the state capitals with representatives of the Indian Army, Navy and Air Force and traditional dance troupes taking part.
The grand parade in New Delhi starts with India's Prime Minister laying a wreath at the Amar Jawan Jyoti "the flame of the immortal soldier" at India Gate, to remember soldiers who sacrificed their lives for their country. India's President takes the military salute during the parade in New Delhi while state governors take the military salutes in state capitals. A foreign head of state is the President's chief guest on Republic Day.
January 26 is also Australia Day.
TWO flags, both celebrating national days, draped the altar at Gladstone's St Saviours Anglican Church on January 26, 2012 http://www.gladstoneobserver.com.au/news/indians-aussies-share-special-day-australia/1251767/