Taco Tuesday is celebrated every Tuesday. Specifically, National Taco Day, which aligns with Taco Tuesday, falls on the first Tuesday in October each year. In 2025, National Taco Day will be on Tuesday, October 7.

Additionally, there is a popular weekly event called Taco Tuesday in the Roblox game "Steal a Brainrot," which happens every Tuesday at 6 PM EST (2 PM PT). For example, in 2025, it will occur on Tuesday, September 16, at 6 PM EST.

So, generally, Taco Tuesday is any Tuesday when tacos are enjoyed, with a special national celebration on the first Tuesday of October.