WhatTimeIsThat 4+

Simple to use Time Zone planner.
See the time in multiple locations, slide the pointer to a time in any of the locations to see the time in the other locations. Click directly on a time in any zone to see that time in the other zones.
Select a specific date for the comparison to factor in daylight saving changes.
The pointer changes color to reflect the sociability of the selected time for a work meeting. 9am to 6pm is green so go ahead and plan a meeting. 9pm to 6am is red, you should really be in bed.
The daylight hours for the location are also shown in the background so you can instantly see if you will be getting up in darkness to take that call..
Add as many Locations as you like.

Simple intuitive controls
Click plus to add a location, click minus to remove a location.
Click the pencil to edit the location. Type in a city, town or even a full address. For example "San Diego, CA" or "Stoke St Michael, Somerset". You can also enter a timezone in the America/Halifax format
Click the clock button to reset to the current time.
You can select to snap the time to the nearest hour, half hour, quarter hour or minute.
The share button lets you copy the current times to mail, messages, notes or others to let you share the planed time.