Third-party calendar tools for Excel - a selection of free third-party tools to insert a calendar (date picker) in the desktop and online versions of Excel.How to insert calendar in Excel (Date Picker control) - step-by-step instructions to create a drop-down calendar.Should they be entered as mm/dd/yy or dd/mm/yy or mm-dd-yyyy? And can I simply type a date like ''? Oh, and what was the date of the first Monday in September this year?Īll of the above problems can easily be solved by inserting a drop down calendar that will let your users fill in dates in a mouse click! This tutorial will teach you an easy way to make such a calendar in Excel, and show how to quickly create a calendar based on a template. When working with large or shared worksheets, maintaining data integrity is the biggest problem, especially when it comes to entering dates. You will also learn a quick way to create a printable calendar based on an Excel calendar template. The tutorial shows how to insert a drop-down calendar in Excel (date picker) and link it to a specific cell.