The following search returns a Knowledge answer from Wolfram|Alpha of "Saturday, May 17, 2025":
https://kagi.com/search?q=tax+day+2025
The link in the ⓘ icon's tooltip goes here where there don't seem to be any instances of May 17th (or even just "May"):
https://www.wolframalpha.com/input?i=tax+day+2025
For either the correct date to be displayed, or no date at all.
The correct date is April 14th, 2025:
https://www.irs.gov/filing/individuals/when-to-file#:~:text=File%20on:,2025