How to hide last seen on whatsapp
If for some reason you want to hide last status on whatsapp you need to change last seen to nobody on privacy settings.
Make sure you have updated version of Whatsapp.
Open your Whats app and click on the menu and go to > settings then go to > Account > and privacy > click on last seen :
The three options available are:
Everyone: Show your Last seen time to Everyone
My contacts: Show your Last seen time to only your contacts
Nobody: Do not show your Last seen time to anyone
Select Nobody to hide your last seen status on Whatsapp