Nation celebrated 146th birth anniversary of founder of the nation Quaid-i-Azam Muhammad Ali Jinnah on Sunday with a renewed pledge to uphold his guiding principles of faith, unity and discipline.

The day dawned with special prayers for the security, progress and prosperity of the country.

An investiture and graceful change of guards ceremony was held at mausoleum of Quaid-i-Azam in Karachi this morning.

Pakistan Air Force cadets handed over the guards' duty to the cadets of Pakistan Military Academy.

Major General Umer Aziz was chief guest on the occasion.

Fateha Khwani and Quran Khwani was also held at the Mazar for Quaid and other leaders of Pakistan Movement.

Special events were also arranged to highlight the ideals and vision of the father of the nation, particularly with regard to rule of law, supremacy of the constitution, and upholding of democracy.

Radio Pakistan, PTV and private TV channels aired special programs in connection with the day to pay tribute to Quaid-e-Azam.