Why will Ram Temple 'Prana Pratishtha' anniversary be celebrated on Jan 11 and not Jan 22?

The Ram Mandir 'Prana Pratishtha' ceremony took place on January 22, 2024, however, its anniversary will be celebrated on January 11, 2025. "In keeping with the tradition of observing Hindu festivals and celebrations according to the Hindu calendar (Panchang), the anniversary...will be celebrated on Paush Shukla Dwadashi...In 2025, it will fall on 11 January," the Ram Temple trust said.