The first day of the month is the beginning of a new month.

He is actually working eight hours a day.

We plan to hold the meeting in Western European Time.

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.

He was studying all day.

He was focused on his work all day long.