[Comma] ...by either tonight, or tomorrow morning

Dear native English speakers,

stuff.co.nz/national/health/ … us-cricket


Is the comma necessary? If you answer yes, could you tell me why?

It’s not necessary. In fact, it probably shouldn’t be there.

Can I say as below:
“I will come there either tonight or tomorrow morning.”
Is it OK?
Please comment.

Thank you, Jamie.

That is acceptable, yes.