Hi, first time to come here

Give myself one day vacation today.
Stayed at home all the weekend for job last week.
Go out to fetch things and go shopping in supermarket.
What makes me surprised is that i see two classmates there.
It is really rare that though we lived in the same street, i never saw them before.
Now i know the reason is my work time.
They both are off work early(just early to me).
I have the different time frame from them......