1. Until indicates the time of change of an activity or situation.

Pattern 1: verb + until + time
They waited until six o'clock.
The boys studied until midnight.

Pattern 2: verb + until + beginning of event
They lived here until their wedding; then they left.
She was busy until her graduation.
They didn't watch the game until halftime.

World Flags

United Arab Emirates

three equal horizontal bands of green (top), white, and black with a wider vertical red band on the hoist side; the flag incorporates all four Pan-Arab colors, which in this case represent fertility (green), neutrality (white), petroleum resources (black), and unity (red); red was the traditional color incorporated into all flags of the emirates before their unification