is it normal to not have your period at night??? HELP

Savannah
So I have had my period for a little over a year now and it's normal, I have my period at the end of every month. But what's weird is that I don't have my period at night. For the 6 days I have my period, I have my period at night for about 1 night out of 5/6 nights. Is this normal? Do you guys have the same "issue"?