Each of the Excel Templates listed below is an Excel calendar for 2013. Excel 2003 has been used to created the templates, so you can open, and use them in Excel 2003 or any more recent version of Excel. Select either the single page planner or the month-per-page calendar.
Calendar 2013 - single page
Calendar 2013 - page per month
There is also a large selection of Excel Calendar Templates, which can be downloaded for free from the Microsoft Office website.