Vastavikta kai kura garne ho bhane, there is no scientifically proven method to predict an earth quake this far ahead.There are different theories people have come up with (like if the count of lost dogs in a neighborhood goes up) but none are proven scientifically.

With that information you can conclude that what you heard is not true. But like most said, Nepal being in the epicenter, we can have earthquake anytime. best thing to do is teach your family what to do when there is an earthquake and where to store essential foods/items in case of one.