Since you are in NY, I'll say anytime after May 24 should be safe for you.

Mine have been spending time on my front porch for the past 2 weeks, getting sun and overnight cool, and they seem to be doing well.

I plant mine out by mid April every year without an issue, along with tomatoes. I live in Merrick.

I start them indoors mid-March so by the time they're planted, the vigorous ones already have 3-4 leaves and are a foot tall.

I leave them out where they get a few hours morning sun for about a week. After that, they can be planted in full sun.