Sikhs marked Vaisakhi, observed each year on April 13 or April 14, with prayers, processions and community meals in Hillingdon, Yiewsley, Huddersfield and across London. The observance commemorates Guru Gobind Singh's 1699 founding of the Khalsa, when he initiated the first Khalsa to formalize Sikh initiation and communal identity. Local gurdwaras served langar, families attended cultural programs, and community groups such as Wow Veg Samosa Gang in Yiewsley provided festival food. The day blends the Khalsa commemoration with Punjab's Vaisakhi harvest traditions, reinforcing religious identity and seasonal community ties.