Continue date with function (calc)

Hi all, I am making a document and in sed document there needs to be a column of cells containing all the days of next month (april 2017).
Rather than typing all 30 dates out manually, I wonder if there might be a function on libreoffice that will fill in the dates for me…

Any ideas?

Enter a starting date in your first needed cell; grab the little square box at the bottom right of the cell and drag down as far as you need.

=<CellAbove>+1

After entering that formula I got a message reading:

LibreOffice Calc found an error in the formula entered.
Do you want to accept the correction proposed below?
=cellabove>+1

So I selected “yes”, and the result in the cell read: #NAME?
What now?

<CellAbove> is just a placeholder for something like A1 if you are in A2 ATM.