Jalsa Salana is a formal, annual gathering of the Ahmadiyya Muslim Community initiated by Mirza Ghulam Ahmad in 1891. The name means "Annual Gathering" and it is a central event for the community, attracting guests from around the world. The convention has gone through a rich development over the century and now attracts guests from outside the Jamaat. The initial venue remained in Qadian, India for many years, but as the community became international in its scope, such conventions began to be held elsewhere. The Jalsa Salana is held in different countries, including the UK, Switzerland, and India. In the UK, the Jalsa Salana is usually held on the last weekend of July and is the UKs biggest Muslim convention, attended by almost 38,000 people from 114 countries. It is a religious gathering held by the Ahmadiyya Muslim Community in the United Kingdom each year for the purpose of uniting and inspiring. It is important to note that Jalsa is not a ritual observed when transforming from male to female, as mentioned in one of the search results.