Well, there is several reason to stay hidden on WhatsApp by disabling last seen timestamp. so, if you are looking for tips on how to hide last seen timestamp from your WhatsApp profile then it can be done within a moment. However, it was not possible earlier and we have done this stuff using 3rd party apps, but now it can be done on WhatsApp officially.
All you have to do is just open WhatsApp application on your device, then go to settings > Advanced > Last Seen Timestamp. Now, just disable it and that’s it.
Now, no one can see your last seen timestamps because of this is officially disabled. :)