[Req] Show all dates in x-axis

It's more of a request than an issue, but showing dates within a specified timeframe without hardcoding it would be nice.

I am doing an analytics tool and my problem is that I can get all the dates from my DB, but only when my site is visited. It would be optimal and convenient if I could set the chart to show (for example) this month/year/week etc, today + & - [x number of days] etc..

Cheers!