Holi is an ancient Hindu spring festival also known as the festival of colors. It is celebrated on the full moon of the month of Phalguna and usually falls on March (sometimes February) in the Gregorian calendar. Holi is a public holiday in some countries with significant population of Hindus.
World Meteorological Day is an annual observance held by the World Meteorological Organization. It has been observed on March 23 since 1961.