I'm delighted to see that the Google doodle for today celebrates pad thai. As far as I can tell it has nothing to do with any anniversary of the invention of the Thai national dish. Maybe the choice has more to do with avoidance of the October "Revolution."
Please see my posts from March on this topic:
Russia’s Real Revolution at 100
Fall of the House of Romanov: 100 Years
See also this PBS article on the controversy and ambivalence surrounding the anniversary.