I have been wondering the same and have been experimenting. It´s too soon to tell, but I noticed that it depends on the type of ítems one is selling. For example, I have three shops, This one, another one for doll related and miscellaneous ítems and one for jewelry,
8:00 p.m. I get views in the bead shop and the doll'related shop, but no views for jewelry.
After 6:00 p.m. I get views in the three shops
In any event, here is a thread I found in the Fórums:
https://www.etsy.com/teams/7722/discussions/discuss/17503929/I edited this post because I forgot to mention that I am retired. I buy many supplies and other items from Etsy shops and I, not always but usually, shop around 7:30 - 8:00 a.m.