A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
You can prepopulate the following formula in column B say from B2 to B10000.
=IF(A2="","",the date which you want to enter)
Say the date which you want to enter is 5-Feb-2018, then formula would be
=IF(A2="","",DATE(2018,2,5))