When are most people online during the weekends?

So I have heard that there are most people online during the following time periods

7~9am (before work)
5~7pm (after work)
9~11pm (before bed)

Those are for during the week days.

It is definitely different for the weekends. Any idea which time periods have the most people online during the weekends?
What time do you go online most often? (both during the week days, and during the weekends).