It is called observation.
They were called Jews.
I believe it is called a solstice.
Halakha
There are Jews all over the world. The one who live in Israel are Israeli Jews, like those in the U.S called American Jews.
A gathering of nuns is called a nunnery. Or a convent.
People who practice Judaism are called Jews.
A large gathering of people is called a group, mob, crowd or a mass.
It is called a levee!
They are called "Jews".
A clerical gathering is often referred to as a convocation, symposium, or conference.
Tango
A gathering
It is a Tribe.
punnet
A gathering of turkeys is called a flock. This is the term used for many different kinds of bird species.
A wake is held the night before the funeral. The gathering after the funeral is simply called a reception.