NYT has removed six words from the Wordle list. You need to refresh the browser to be on the new list and have your device set to the right date.
All 2,315 2,309 words are stored right in your browser when you play a game. When you connect to the site, you download a nifty script that figures out what day it is on your device and shows you the correct puzzle.
It is a really smart bit of programming.