I will start the meeting at 9 a.m. Eastern European Time.

The time complexity of this algorithm is O(n).

We shared the progress of the project in a video conference.

In her anger, she decided to perform the ushi no toki mairi.

He is interested in diachronic linguistics studies.

He is interested in synchronic linguistics.

My class starts at eleven o'clock.

I eat lunch at twelve o'clock.

He has been committing misdeeds for many years, but finally the time for repayment has come.

Greenwich Mean Time is the standard that determines the time of the world.