Birthday invitations phrases need to be interesting and catchy hence avoid boring sentences. You can choose your birthday invitation phrases according to the kind of guests they are intended for. This is because invitation phrases for adults and children are not the same and if you have a mixed guest list, then you just have to choose a birthday invitation phrase that will suit all the guests.

The phrase also depends on the celebrant and if you are not the one celebrating then you have to ask the person to tell you what he/she would like the invitations to have. You may be for the idea of using a wise quote or saying but the celebrant is interested in a poem which he/she has composed specially for the occasion.

You just want to invite someone to the party hence no need to include many words in the phrase. Important is that you tell the invitee what the party is for, the venue, time and probably direction for getting to the place. You may also need to include some other details such as the dress code if you have a themed party that requires a certain kind of dressing for all.