I got an email that had an unfamiliar time zone in it. My intuition said that if I selected the text and right-clicked then I’d be closer to knowing what the corresponding local time was. When I did, the best option I found was to search the web.

The Kagi search was helpful, but I shouldn’t need internet access to compute an answer.

Wouldn’t it be cool if I could install a program that added this feature to relevant context menus? And not only in Thunderbird, but in every program that has text and context menus?