You can place DayPilot inside a div with id="daypilot" and define the following styles that will override the global ones:
#daypilot td, #daypilot th, #daypilot caption { padding: 0px };
The div could look like this:
<div id="daypilot">
<DayPilot:DayPilotCalendar .... />
</div>