Go to Settings > General Settings
Scroll down to Date & Time Options and Right Click the link to Update your time zone in your Passport Profile... Open in a new tab...
In Passport, scroll down to the Time Zone settings, change the Time Zone to anything else, click Save Changes
Back on the General Settings tab, scroll to the bottom of the page and click on Save Changes
Go back to Passport, change the Time Zone to the correct one, Save Changes.
Return to General Settings, Save Changes.
This happens from time to time (no pun intended) and for me it seems to happen when clearing cookies and cache in my browser. It is an annoyance, but easily overcome.