Dop I use a or an in the following sentence.
You are invited to attend a European Festival
or You are invited to attend an European festival
Dop I use a or an in the following sentence.
You are invited to attend a European Festival
or You are invited to attend an European festival
a and an are indefinite articles, not prepositions.
You use the one that makes sense when you read the phrase out loud. In this case, you use a because European is pronounced as if it begins with a consonant (sounding like y as in yellow) and not as if it begins with a vowel.