An early bird deal or offer is one that is available at a reduced price, but which you must buy earlier than you would normally do. Early bird discounts are usually available at the beginning of the season
a person who gets up very early in the morning a person who arrives early before others do
An early bird is someone who does something or goes somewhere very early, especially very early in the morning. We've always been early birds, getting up at 5.30 or 6am