This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Guru Gobind Singh, the tenth Sikh Guru, gathered Sikhs at Anandpur Sahib on 13 April 1699, the day of Vaisakhi, the annual harvest festival already familiar to the gathered crowd. On that day he founded the Khalsa, the order of initiated Sikhs bound by a distinct code of conduct and outward identity, turning a festival the crowd had come to expect into the occasion for an entirely new institution.
The founding gave the Sikh community a form it had not had before: initiated members marked out by a shared code and appearance, rather than a following defined only by allegiance to a living Guru passed down teacher to teacher. That institutional and visible identity has organised Sikh religious and political life ever since, carried forward long after the line of living Gurus itself ended with Guru Gobind Singh, its own founder.
What this changed for Sikhism's spread was the creation of a durable, recognisable membership the faith could carry into every place it later travelled, well beyond the Punjab where it was founded. The Khalsa identity founded at Anandpur Sahib on that single Vaisakhi gave Sikhism a form of belonging that did not depend on proximity to any one teacher or any one place, a structure built from the outset to outlast the moment and the man who created it.