Oh gosh, you had a national "observance" coincide! I hate when that happens - i've browsed Google's commemorative logos, and discovered that there are several that occur on the same date... they detect location and give the most "applicable" which doesn't always correspond to my personal preference!
I too get a localized link in that the search terms are not in English, but at least this time i'm getting the Earth Day logo... lol. Today's doodle's aren't in the Google doodle store yet... they should be tomorrow since i saw some for the 21st in there. Once it is added, you'll be able to see it here:
Google Earth Day doodles
last year's was also very pretty - click on it to view the animation.
~ waves ~