Sincerity is the most important thing you need to apply when you are thinking about the words to include to wish someone a happy birthday. You do not even have to be poetic or a wordsmith to get it right. Take your rime and think about how the person makes you feel and what they mean to you. This is the easiest way to find words that the person will cherish.

If the card is for someone you are in a relationship with, you should include specific details and some descriptive words to describe the memories you have shared. Use some quotes from your favorite movie, song or poems that make you think of the person.

For a family member that is younger than you, write about the things that make them special and include a memory in their childhood that they may not remember. For older family members, use words that describe the values or qualities that you have learnt from them.

For friends, funny words are the most appropriate since you may even share jokes that nobody else knows about. Some sentimental words can also be used when wishing someone a happy birthday especially if they are specific.