Happy National Filet-O-Fish® Day 🎂🐟 The real fans finally have their own holiday. The Filet-O-Fish® has been a McDonald’s staple for decades and today it gets its moment. mcdonaldsuk is celebrating with a special offer: Double Filet-O-Fish® for £2, available through the app only. This one’s for the real fans. £2 Double Filet-O-Fish®. Via the McDonald’s app only. Order via ‘Rewards & Offers’ between 11:00–23:59 on 01/07. One-use only. Fees apply to delivery orders. 18+. Participating restaurants only. Subject to availability. See McDonald’s.com for full app T&Cs. © 2026 McDonald’s. #Pubity #FiletOFish #McDonalds #Ad #NationalFiletOFishDay