Display the logged in user's local time, optionally in the 'correct place' in the list

I'm using the latest Date/Calendar modules for an application and WorldClock to orientate the users.

For the scheduling system where meeting attendees are in different timezones, I would like the option to display the logged in user's correct time in the world clock list, with configurable text, for example "Your Time" or "Local Time".

This could default to the site's current time, labelled "Site Time" for anonymous browsers.

This might seem superfluous as the user can look at the time on their PC, but I need it to show the user what time the website *thinks* it is for that user, based on what they have got their user time zone set to.

Example:

1) If the user hasn't set their time zone correctly in their account settings it will alert them to this by displaying the wrong 'your time' value.

2) If the user has their time zone set correctly, their time will be correct.

Position to display it in the list:

Either:

a) At the top
b) At the bottom
c) Better Still ... The ability to sort the times and include the user's time in the correct place. However, I'm not sure how you would define which TZ is displayed first in the sorted list. This way the user can see how far back/forward other zones are.

Idea: Optionally Displaying the other timezones as offsets rather than absolute times.

Apologies. This idea scope crept as I typed it.