FATHER is a name on which our life relies .we don't need to explain the definition of father or tell that what he has done to us.we know that what father has done for us ,he has fulfilled our each & every demand. what can we children do to thank him ? we just have to give him our trust respect & obey him .it is just very simple.it is also our duty to help him out all time,not neglect him & just follow what he says . it is sure that he would be happy. fathers day just not means that offer a gift to father & he'll be happy,no he'll surely be only a little happy , but it's about a lifetime happiness which we need to give him & it only can be given when we walk on his footsteps & inculcate in our lives the values he taught. this is the true meaning of father's day ..
hope it's enough to help you out