What are the difference b/n meditation in the morning and evening?

In my opinion, on the morning I would prefer a medidation to for motivation to get throughout the day or to be less stressful if I have an exam or an interview or another stressful event.
On the other hand, on evening I prefer to relax and wrap all I been through on the day. Often I would prefer a medidation before going to sleep to get sleepy and satisfyied and worryless.