Online registration for the Char Dham Yatra began at 7 am on March 6, officials said. The pilgrimage will start on April 19 on Akshaya Tritiya with the opening of Gangotri and Yamunotri temples. Kedarnath temple doors will open on April 22, followed by Badrinath on April 23. Offline registration will begin on April 17 in Rishikesh, Haridwar and Dehradun.