Sativa is considered a daytime strain because, although it can work quite well, and if you don't overdo it, it allows you to putter around during the day. It usually doesn't have all the relaxing effects of an indica, which is usually better to relax and de-stress in the evening. They call indica "in- da couch" for a reason. Hybrids can work well, but there are more variables since you're mixing strains. When you purchase a strain, they can usually tell you the best strain for an individual purpose though. I'm in Canada and it's been legal here for quite awhile.