Hello, thank you for the replies.

So I have this (please note I'm new to excel, so I'm just learning):
excel.jpg

Is there any way I can change this: [$-409]d-mmm-yy;@ as shown in the screenshot I uploaded, so when I entered, for example, 16, it will be 16-Jan-2015? the month and year is the same as stated in the cell under the MONTHLY EXPENSE SUMMARY cell.