Calendar Picker

You can either manually enter the Start and End Dates of each task by using dd/mmm or mm/dd/yyyy format or you can place your cursor in that cell and click the Calendar button to launch the Calendar Picker. If there is a date in that cell, the Calendar Picker will highlight that date. If it is an empty cell, the Calendar Picker will highlight Today's date. Just click on the date you want to select and it will be entered in the Calendar field.
 

In Version 2.4, the Calendar Picker stays open and you can use it to enter the dates for multiple tasks.