Sending Father's Day cards is a long-standing tradition that and in the UK alone, millions of Father's Day cards are still purchased every year. The act of taking time to choose and write a card demonstrates that you're thinking of your dad. This little effort can go a long way in strengthening the connection between you. Compared to elaborate gifts, cards offer a simpler way to show you care. They're affordable and convenient, especially if you're far away from your dad.