That's Estonian for Happy New Year!
Or if you want in Russian, С Новым Годом!
And if you want to see how is a winter day in Estonia,
this was the Last Day of 2008 in Tallinn!
31.08.2008: Temperature average -1°c, day of 6h and 12min (sunrise at 9:18, sunset at 15:30).
More info in TimeAndDate.com and weather.com websites.