Andy McDonald

"Sunbird Timezones" is a browser extension that allows users to easily monitor time zones from around the world, all within the Sunbird platform. Keep track of appointments, meetings, and deadlines, no matter where they're located.

SeaMonkey add-on that shows mini clocks on your status bar.

FoxClocks for Thunderbird is a software extension that allows users to check the time across the world by displaying clocks on the status bar. It is compatible with Windows, Linux, and Mac OS.