I have a list in text format as follows:

27/03/2006 00:00
28/03/2006 00:00
29/03/2006 00:00
30/03/2006 00:00

& I would like to use autofill to creat a list of each day of the year.
However, when I try to do this, it just adds on seconds rather than
continuing with the days. How can I get the list to carry on in the same
format, without changing the cell format?