He, being a sleepyhead, was late for school again today.

His frequent lateness is becoming a problem.

I was late for school because the train was delayed.

I overslept this morning and missed the bus.

I overslept this morning and missed the train.

It is very hot today.

It is very hot today.

Good day, it's a wonderful day, isn't it?

(As for) today, I will start a new job.

He is my best friend.