Let Google Show Users Your Special December Hours
It’s that time of year again. You want to showcase the hours you’re open over the holidays while making sure you get the time to celebrate with your own loved ones. Providing special hours in you Google My Business (GMB) profile does this for people using Google to find this info. Also, you can do this on your smartphone on the fly. Go to your favorite local coffee shop, sip and sit for 5 minutes, and your special hours are set up.
There are a few ways to go about this. An easy one is to log into your GMB -> Overview -> Profile -> Clock/Calendar Icon

Google My Business Overview from a smartphone
Edit Special hours (for restaurants and other locations who are open for lunch, then back open for dinner, you can note this in here by clicking the ADD HOURS button)

Edit Special Hours
A nice thing about this is after you set it up, it automatically goes away after your dates of special hours. No follow up needed!