Time difference — the difference in time between regions or countries (e.g., important for travel or international calls).
日本とロサンゼルスの時差は約17時間だ。
The time difference between Japan and Los Angeles is about 17 hours.
長時間のフライトで時差ぼけになってしまった。
I got jet lag from the long flight.
国際会議は時差を考えて時間を決めた。
The international meeting time was set taking time differences into account.