When can I start to leave all my plants outdoors?

[RL420]

I live in northern minnesota, I have a few plants I've been bringing in the last few weeks to start the flowering process early. I go from 7 to 7. I'm asking when can just leave them outdoors for good. without messing them up?

 

[RL420]

The sunsets at 824pm

 

[mchappy]

Whens sunrise?

 

[RL420]

706 am as of today.. It's just getting to be a hassle every morning and evening. Always have to be here to put them out and away. Dont get me wrong the outcome will be awesome, just that i want to be able to do other things at the same time..