the scheduled time

I start the meeting.

私は会議を始めます

I start the meeting at the scheduled time.

私は定刻に会議を始めます

I start the meeting at the scheduled time every day.

私は毎日定刻に会議を始めます

I start the meeting in the office at the scheduled time every day.

私は毎日定刻に事務室で会議を始めます

I start the meeting with my coworkers in the office at the scheduled time every day.

私は毎日定刻に同僚たちと事務室で会議を始めます