The Compact Calendar is a versatile planning calendar that is easy to customize and print with Microsoft Excel. It comes in three different week styles. Microsoft Excel 2007 or newer is required to modify the Compact Calendar. Several worksheets are available for the 12-month, 16-month, Holiday, and Instructions table. If you need to make a longer calendar, you can do it, just extend the range as you would normally with any list in Excel. App 12 Months, is a strategic planning app for the iPad that is inspired by the Compact Calendar. 12months is an iPad calendar app that gives you an overview of the entire year.