It looks like they only close for seven Jewish holidays (Purim, Passover, Shavuot, Tisha B'Av, Rosh Hashana, Yom Kippur, and Succot)

https://www.bhphotovideo.com/find/HelpCenter/StoreInfo.jsp

That's a lot more than any other business I can think of, but it might not be a majority depending on how you count:

https://en.wikipedia.org/wiki/Jewish_holidays