Figure out what it takes to do that (there are a lot of ways – a big part of programming is finding the best way (fastest, takes least code, easiest to understand & update)
When we click on the time zone, we want the box to be filled in
How do we make something happen when we click? (Use events)
What do we want to happen when we click?
Get the time and am/pm the user entered, calculate the new time and put it in the box
How do we calculate the new time?
Start easy – just add/subtract
But then we need to change it if it’s <1 or > 12