The new McDonald’s “secret menu” in the UK and Ireland is described as a limited-time offer starting from 5 January 2026, but McDonald’s has not publicly given an exact end date yet.

What “limited time” likely means

  • The secret menu (items like the Surf N’ Turf, Chicken Cheeseburger, Espresso Milkshake, etc.) is launching from 5 January 2026 in UK and Ireland restaurants “for a limited time only.”
  • McDonald’s seasonal or promo menus in the UK typically run for around 4–6 weeks, sometimes up to about 8 weeks, depending on how the promo performs and operational plans. This pattern is mentioned in general coverage of their 2025–2026 rotations, though without specific end dates for this particular drop.

What is staying longer

  • The Big Arch burger, which returns on the same day as the new secret menu (5 January 2026), is being brought back as a permanent menu item in the UK and Ireland.
  • That means even after the limited secret-menu mashups disappear, the Big Arch should remain available alongside regular classics like the Big Mac, subject to any future menu changes.

How to check exact dates for your location

Because the promo is time-limited and can vary by country or even region, the most precise way to know how long it’s out near you is to:

  1. Check the “What’s New” or “Latest Menu” section for your country on the McDonald’s website or app (for the UK, this is the “Latest Menu 2026” page).
  1. Look at the small print or promo banner in the app or at your local restaurant, which often lists “available until” dates or “while stocks last.”

Bottom line: the new McDonald’s menu you’re seeing now is a limited-time drop starting 5 January 2026 and will probably last only a few weeks, while the Big Arch is planned to stick around as a permanent addition in the UK and Ireland.

Information gathered from public forums or data available on the internet and portrayed here.