Auto fill dates with 2 identical dates for each consectutive cell excel 2003

[tmitch]

If I put in a date for example 1/1/2015 in A1 and grab the autofill handle and pull down, it adds consecutive dates. I need two identical dates in a row (for keeping track of morning and evening blood pressure readings).
TIA

 

[tmitch]

Try formatting the cells as a date format (right click - format).

I did that but the year was wrong. But then, when I erased the wrong data and retried it, this time it worked with the right dates????? Anyway, I've got it done (had to cut A3 and move the data up). Thanks eve ryone for your help.