Cherry blossom trees in full bloom in Washington D.C. Children prepare to learn etiquette in "royalty banquet hall" of Disneylan...

Cherry blossom trees in full bloom in Washington D.C.

Children prepare to learn etiquette in "royalty banquet hall" of Disneyland in Hong Kong, south China, March 15, 2012. Hong Kong Disneyland launched an interactive activity recently, in which children can play the role of Disneyland princess. (Xinhua/Li Ying)

Children prepare to learn etiquette in "royalty banquet hall" of Disneyland in Hong Kong, south China, March 15, 2012. Hong Kong Disneyland launched an interactive activity recently, in which children can play the role of Disneyland princess. (Xinhua/Li Ying)

Children prepare to learn etiquette in "royalty banquet hall" of Disneyland in Hong Kong, south China, March 15, 2012. Hong Kong Disneyland launched an interactive activity recently, in which children can play the role of Disneyland princess. (Xinhua/Li Ying)

Children prepare to learn etiquette in "royalty banquet hall" of Disneyland in Hong Kong, south China, March 15, 2012. Hong Kong Disneyland launched an interactive activity recently, in which children can play the role of Disneyland princess. (Xinhua/Li Ying)

Children prepare to learn etiquette in "royalty banquet hall" of Disneyland in Hong Kong, south China, March 15, 2012. Hong Kong Disneyland launched an interactive activity recently, in which children can play the role of Disneyland princess. (Xinhua/Li Ying)

Children prepare to learn etiquette in "royalty banquet hall" of Disneyland in Hong Kong, south China, March 15, 2012. Hong Kong Disneyland launched an interactive activity recently, in which children can play the role of Disneyland princess. (Xinhua/Li Ying)

The National Park Service forecasts that the peak bloom is between March 20 and 23, earlier than those of previous years, due to temperatures warmer than average.