You'd best let them know about this oversight ASAP so they can take immediate corrective action!
They'll have to remove the "Holi" from "Holiday", and then their site will simply read: "Happy ...Day"!
Wow... It must really be hard sometimes to be a liberal that takes their beliefs in Political Correctness to a near religious level in itself.
Wait until the find out what “goodbye” means, “God Be With Ye.” They’ll never be the same. :-)