When I drink tea in the evening, it’s usually herbal (I like fruity teas best) or decaffeinated as I’m superstitiously convinced any caffeine after 2pm will negatively affect my sleep; my husband says it’s psychosomatic but I don’t care.
There are several lovely little books that describe the ritual of tea:
by Theresa Francis-Cheung
Tea Gardens : Places to Make and Take Tea by Ann Lovejoy
Tea Culture by Beverly Dubrin
The Art of Taking Tea by Kim Waller