We will start the meeting at 3 p.m. Central European Time.

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

This system enables real-time operation.

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

He tried to solve the problem all day long.

Today is my birthday.

Our store has a regular day off every Monday.

Our project is scheduled to be completed on the twentieth day of the month.

Day after day, he continued to strive to solve the problem.

Today is my birthday, a very lucky day.