starting time; start time
Neutral noun used in schedules, events, and formal contexts to indicate the time something begins.
会議の開始時刻は午後2時です。
The meeting's start time is 2 p.m.
開始時刻に遅れないようにしてください。
Please make sure not to be late for the starting time.
We set the meeting's starting time at 10 a.m.
The starting time has already passed, but he still hasn't arrived.
Due to bad weather, we will change the starting time.
As the starting time approached, the venue was filled with tension.