> Your regular hours probably show up when Googling your business name, but any holiday-specific hours won't.

they often do. Google is quite insistent on getting businesses to update their holiday hours for any common holidays, and when you look up business hours on a holiday you see the result of this - many businesses do update their holiday hours, and the business listing tells you whether the business owner has confirmed that the hours are correct for the holiday, or they have not updated the page for the holiday.