This is a true story happened on February the twenty-ninth,2008.
a student was late for school on that day.
The teacher asked him why he was late.
He said "There is 'month' and 'date' in my clock but there isn't 'year' in it.The clock didn't know what year it is now.And of course it didn't know that this year is a leap year.So the date on it is 'March the first' instead of 'February the twenty-ninth'.I looked at the calander and found that March the first is Saturday. So I thought that I didn't need to go to school today.Some time later,I found that I was wrong.So I went to school immediately. And now I'm here."

Question:
What should the teacher say and do then?

Clocks don't have month and day. you are making an excuse. Go to the principle's office now.