Ever since upgrading to macOS Sierra, I have been able to keep track of when programs use my location because the menu bar displays an icon whenever an app requests this information. I have noticed that about once per hour, the location services icon appears for a few seconds, and when I click on it it says "Apps requesting location: Setting Time Zone"
I've tried disabling automatic time zone detection in System Preferences (Under the Privacy > Location Services options), and this does not prevent this from happening. Here is what this setting looks like on my computer, note that the "Time Zone" box is already unchecked:
I looked at the list of other programs that have recently requested my location, and nothing unusual appears:
What is causing this, and is there any way to disable it? If this cannot be turned off, then is there a way to prevent it from appearing in the menu bar?