The 2027 date
National Taco Day 2027 is Tuesday, October 5. That is the first Tuesday of October in 2027 under the rule National Day Calendar adopted with Taco Bell in September 2024.
The full history of the move, the stale October 4 listings, and the pre-2024 founding chain are on the main National Taco Day guide. National Nachos Day follows on November 6 on a fixed calendar date.
Why October 4 still shows up in search
From 2009 through 2023 the observance was fixed on October 4. Secondary calendar sites copied that date for years, and many have not refreshed their templates since the 2024 announcement. October 4, 2027 would be a Monday, which is one quick check that a listing is still on the old rule.
Taco Bell and Del Taco both ran 2025 promotions on Tuesday, October 7, not October 4. Treat chain deal pages as the live signal once they publish, not a copied October 4 line from an aggregator.