KARACHI, Pakistan

Millions of Sikhs around the globe are celebrating the 550th birth anniversary of Guru Nanak, founder of their religion.

The three-day celebration which kicked of from a small city in northeastern Pakistan will run through Nov. 12.

What makes this year special is the opening of a key border crossing between India and Pakistan allowing Indian Sikh pilgrims visa-free access to Kartarpur Sahib, the most revered temple in the religion and the final resting place of Guru Nanak.

Read more: Sikhism founder Guru Nanak was a wanderer and mystic