Offer is valid every day excluding Bank Holidays, Father’s Day, Mother’s Day, and Valentine’s Day. Offer entitles the person celebrating his or her birthday to have a free dinner a day before, actual birthday or next day only only when accompanied by at least one full paying adult. To redeem the offer, please quote “free birthday meal” and present an official photographic PROOF of DOB to your server when being seated. Offer is for food only and excludes drinks. Cannot be used in conjunction with any other offer. This offer is subject to availability and COSMO Restaurants reserve the right to withdraw or alter this offer at any time without prior notice. Offer is valid at COSMO Derby only.