Can You Learn Two Languages at the Same Time?

Is there a specific time to work on your concentration? For example, some people before night, others early in the morning. I think you do what's best for you. If you have more time at night or you're more of a night person, then do it at night. So right now, with my babies, I just do it when I can. I'm better at night, honestly, but I try to do it in the day too.