Delhi University has many colleges and every college has their own time table.  It's depend on which college you got admission,  is it morning or evening college. 

Morning college:

It starts from: 

8.30

9.00

9.30

10.00

End on

12.30

1.00

1.30

2.00

3.30

Even some time practical goes up to 4.00 - 5.00.

Evening college:

It starts from 1.00 or 2.00, it varies but last class does not cross 7.30.

Saturday is unpredictable. ( some sem has Saturday classes and has not)  and sunday is off. 

Hello friend, It depends upon colleges. Certain colleges are off on Saturdays, certain colleges aren’t. As far as I know, Kirori Mal isn’t off on Saturday, neither is Dyal Singh, but Delhi College of Arts and Commerce is closed on Saturdays. You can always check the college websites and access the semester time tables to find out.

The colleges that have Saturdays off generally have a more hectic schedule for the five working days, unlike the more laid back schedule of colleges that have six working days.