Tax Day is the usual deadline for filing US federal income tax returns, April 15. When it falls on a weekend the deadline moves to the next weekday. The IRS confirms the exact deadline each year.
No. Tax Day is not a federal holiday in the US, so government offices, banks and schools follow their normal schedule unless they choose otherwise.
Why does the date of Tax Day change each year?
The date stays the same; only the weekday moves. A common year has 52 weeks and one day, so a fixed date moves one weekday later each year, and two after February 29.