How to get the earlist date based upon column A

Hello Varun
i am so happy to receive the updated xmal, it is so cool!!
i understood now this is Linq query, which is so awesome and amazing!
i also saw some helped cases you have granted to other users! it is miracle.
thank you and thank you very much for your quick help! this has solved the terrible issues i am facing!
have a nice day!
Mingzi