I’d like to convert part of a date/time text string to a number, perform addition/subtraction on it, taking into account the am/pm switch-over at 12:00, and run it behind the original. Possible?
For example, in the existing HTML,
<span class="time">12:30pm EST</span>
should display as
<span class="time">12:30pm EST / 9:30am PST</span>