Increment date in Calendar with strtotime

[stopsatgreen]

In the calendar module I'd like to have an extra variable which is one day after the start date ($event.event_date_start). I think I need to use strtotime, but I can't work out how. At the moment I have a UDT with the following function:

$smarty->assign('plusoneday', strtotime('+1 day'));

But it's working on today's date, not event_date_start. How should I do this?

[stopsatgreen]

*bump*

I'm not having much luck getting my questions answered lately 

[streever]

I have the same problem.

We need to grab somehow the value of the event's day: but I am having a hard time figuring out how to grab that.