What do I need to know?
utc_offset, which is returned on Place Details requests and
opening_hours.open_now, by the isOpen() method in Place Details requests only.
If you are not already doing so, using the fields parameter in Place Details requests will save you money in case you don’t need all the fields for returned places. If you do not specify at least one field with a request, or if you omit the fields parameter from a request, all possible fields will be returned, and you will be billed accordingly, for all data SKUs.
What do I need to do?
Before November 20, 2020, follow the Place Field Migration guide to make the necessary property and method substitutions and to see the alternative options for obtaining opening_hours data to prevent user experience degradation. Google has also recently published a video explaining how to get current open status through Place Details using the isOpen method and utc_offset_minutes field.