Class timings can vary significantly based on the institution and the specific program. Generally:

1. Morning Classes: Typically start around 9:00 AM to 10:00 AM.

2. Afternoon Classes: Often begin around 1:00 PM to 2:00 PM.

3. Evening Classes: May start around 4:00 PM to 5:00 PM, especially for part-time or evening programs.

For exact timings and schedules, it is best to consult the academic calendar or timetable provided by the specific institution or program you are interested in.