Guru Nanak was the first Guru of the Sikhs and every year Sikhs gather to celebrate his birth, in what is one of the most sacred event for Sikhs.

Indian Sikh devotees gather as they pay their respects during an event to mark 548th birth anniversary of Sri Guru Nanak Dev, some 75 km west of Lahore, Pakistan on November 4, 201
Indian Sikh devotees gather as they pay their respects during an event to mark 548th birth anniversary of Sri Guru Nanak Dev, some 75 km west of Lahore, Pakistan on November 4, 201 (AFP)

Guru Nanak was the founder of Sikhism, having been born 549 years ago in 1469 in the town Nankana Sahib in Pakistan's Punjab province.

A Sikh devotee blows fire during a procession ahead of the birth anniversary of Guru Nanak in Jammu, India.
A Sikh devotee blows fire during a procession ahead of the birth anniversary of Guru Nanak in Jammu, India. (AP)

Thousands of Sikh's make the journey from India to Nankana Sahib to celebrate the occasion. 

Indian Sikh devotees gather as they pay their respects during an event to mark 548th birth anniversary of Sri Guru Nanak Dev, some 75 km west of Lahore, Pakistan on November 4, 2017.
Indian Sikh devotees gather as they pay their respects during an event to mark 548th birth anniversary of Sri Guru Nanak Dev, some 75 km west of Lahore, Pakistan on November 4, 2017. (AFP)

But across the world, every year Sikh's celebrate the event in either October or November - or in the full moon month of Katak.

A  Pakistani paramilitary soldier stand guard as Indian Sikh devotees line up at immigration at the Wagah railway station after crossing the border at Wagah on November 2, 2017, as they arrive to mark the 548th birth anniversary of Sri Guru Nanak Dev.
A Pakistani paramilitary soldier stand guard as Indian Sikh devotees line up at immigration at the Wagah railway station after crossing the border at Wagah on November 2, 2017, as they arrive to mark the 548th birth anniversary of Sri Guru Nanak Dev. (AFP)

This year the occasion is November 4, while in 2018 the event will be celebrated on November 23.

Indian Sikh warriors display traditional martial art skills during a religious procession ahead of the birth anniversary of Guru Nanak in Jammu, India.
Indian Sikh warriors display traditional martial art skills during a religious procession ahead of the birth anniversary of Guru Nanak in Jammu, India. (AP)

Guru Nanak Gurpurab is celebrated by the Sikh community all over the world and is one of the most important festivals in the Sikh calendar. 

Sikh pilgrims attend a religious festival to celebrate the 549th birth anniversary of their spiritual leader Baba Guru Nanak, at Nankana Sahib near Lahore, Pakistan.
Sikh pilgrims attend a religious festival to celebrate the 549th birth anniversary of their spiritual leader Baba Guru Nanak, at Nankana Sahib near Lahore, Pakistan. (AP)

The festival is celebrated as the day to remember the holy guru. It is a reminder for the devotees to follow Guru Nanak's teachings and overcome the five vices of lust, greed, attachment, anger and pride.

Indian Sikh children participate in a religious procession ahead of the birth anniversary of Guru Nanak in Jammu, India.
Indian Sikh children participate in a religious procession ahead of the birth anniversary of Guru Nanak in Jammu, India. (AP)
Source: TRTWorld and agencies