Specifying individual days to grab

Using the below will obviously grab today's EPg data:

'0\n'

Using this will grab today and tomorrow:

'1\n'

...is there a way though to only grab certain days...for example only grab tomorrow's data, or grab 5 day's worth of data, but starting from tomorrow.

I haven't found anything in the documentation suggesting that is possible, but I thought it best to ask...

Thanks