A tax-free weekend generally lasts for a short period, often over a weekend, typically from early Friday through midnight Sunday. For example, in Texas in 2025, the tax-free weekend runs from Friday, August 8, through midnight Sunday, August 10. Similarly, many other states have tax-free weekends that last 2 to 3 days, usually covering Friday through Sunday of a particular weekend.

In summary, the duration of a tax-free weekend commonly spans about three days, starting early on Friday and ending late Sunday night.