An estimated 60,000 Sikhs gathered in California's Yuba City, which has one of the largest concentration of Sikhs outside the Indian state of Punjab, to celebrate the 538th birth anniversary of the founder of Sikhism, Guru Nanak Dev.
The Sikhs are participating in the 27th annual Yuba City Sikh Parade being hosted by the Sikh Temple Gurdwara there.
"People of all races, religions and gender are invited to join with the Sikh community to share in the message of universal love, brotherhood and sisterhood," said Didar Singh Bains, president of the Sikh Temple Gurdwara.
"Sikhism teaches community service, hard work, honesty and respect. I think any community would value those character traits," he said.
The city is among the first places that many Sikhs settled in when they arrived in the US more than 100 years ago.
Organisers of the annual parade expect the event to generate about $20 million for the local economy, according to appeal-democrat.com.
Last week, the authorities received a threat mail signed by the "Taliban group" to destroy the gurudwara. The Federal Bureau of Investigation (FBI) is investigating the case.