[Q] How to use old version WhatsApp?

Hello guys i am install old version whatsapp but don't use because obsolote (software expired date)

How to fix/bypass or modify this date?

Im open apk and look apk files but not found.

Where is edit file?? Example: "This version obsolote 26.03.2015 please install new version."

Please help me. I tried Xposed WhatsApp mod etc but not working.