Yeah, around 7pm is probably when I would go. Since he wasn't being specific, he probably wants to leave it up to you, but go early in the evening, not at 10pm
eve·ning
ˈēvniNG/
noun
noun: evening; plural noun: evenings
1.
the period of time at the end of the day, usually from about 6 p.m. to bedtime.
source: google