serial generated ref numbers to read as dates

zeldadav

New Member
Joined
May 6, 2021
Messages
1
Office Version
  1. 2010
Platform
  1. Windows
hi, i want to change a column of serial generated ref numbers to read as dates to do an age analysis. column E CAS numbers. I want to replace all preceding numbers of the first / to 01 to convert to a date.

1620280816615.png
 

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Try
Excel Formula:
=SUBSTITUTE(A1,LEFT(A,FIND("/",A1)-1),"01")+0
and format as date
 
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