World health day is an international day celebrated on April 7 of each year. The day marks the World Health Organizations' founding, and was first celebrated on April 7 1950.
Each year the world health day has a theme, related to a subject of major importance to global health. For this, a number of regional and local events are organized from the World health Organization, to draw public attention to the problem.
Mother's Day is a day that honours mothers and motherhood. The celebration of mother's day is usually on May, although it is not an actual international day, and each country has its own date. Furthermore, for most countries it is a moving holiday, as for example in US where it is celebrated on the second Sunday of May each year.
World Philosophy Day is celebrated every 3rd Thursday of November. It was first celebrated on 21 November 2002. It was proclaimed by UNESCO in 2005, with the goal to underline the enduring value of philosophy for the development of human thought, for each culture and for each individual.
As underlined in the establishment ceremony, “philosophy is a discipline that encourages critical and independent thought and is capable of working towards a better understanding of the world and promoting tolerance and peace”.
International Women's Day or "world women's day" is celebrated throughout the world on March 8 every year. Although the International womens day (IWD) started as a political event, for the working women, it has become in many regions a celebration of respect and love towards women. Still, the original political meaning of the women's day is very relevant today in many -even supposedly advanced- cultures.
According to wikipedia, the original protests were mainly for the right to vote and to ban sex discrimination :
World Environment Day is celebrated all over the world on 5th of June every year. The purpose of this world day is to increase awareness on environmental issues around the world, and encourage people and governments to act on them. Unfortunately, up to now, the World Environment Day has not changed the way the world reacts to environmental problems, and needs more attention from everyone.
According to the United Nations website: