March 12 is the anniversary of the death of Dr. Sun Yat-sen. Dr. Sun Yat-sen had attached great importance to forestry. He served as provisional president of the Republic of China soon after the establishment of the Nanjing Government, in May 1912 established the Ministry of Agriculture and Forestry, under the mountains Secretary in charge of national forestry administration of. Promulgated in November 1914 the first of China\'s modern history, a \"Forest Law\", in July 1915, the Government has stipulated that the annual \"Qingming\" as Arbor Day.
In February 1979, the Fifth National People\'s Congress Standing Committee in accordance with the sixth meeting of the State Council, the proposal will be adopted March 12 as Arbor Day in our country resolutions, the resolution of the significance of the active mobilization of people of all ethnic groups to plant trees reforestation, to speed up the greening of the motherland and the pace of the forestry building. Will be the date of Dr. Sun Yat-sen passed away as Arbor Day in China, but also to cherish the memory of the great Dr. Sun Yat-sen, Sun Yat-sen had a symbol of unfulfilled wishes to achieve in the new China and to achieve better. In 1981, Comrade Deng Xiaoping\'s initiative, the fourth meeting of the Fifth National People\'s Congress adopted the \"all the people on the resolution voluntary tree-planting campaign.\" March 12, 1990, Ministry of Posts and Telecommunications has issued a set of four \"Green motherland\" stamps, first as a \"universal voluntary tree-planting.\"
The first Arbor Day in modern times is the establishment of the United States, Nebraska. April 10, 1872, Morton Landscape Association Nebraska at a meeting, proposed the establishment of great importance to the recommendations section. Morton accepted the state\'s proposal to set April 10 for the state\'s Arbor Day, and in 1932, the world\'s first Arbor Day Issue stamps, screen planting for the two children.
According to UN statistics, the world has more than 50 countries have set up a Tree Planting Day. Due to different national conditions and geographical location, Arbor Day in the States is not the same name and time, such as Japan, known as the \"festival of trees\" and \"Green Week\"; Israel referred to as the \"New Year\'s Day trees\"; Myanmar known as the \"tree-planting on \"; Yugoslavia known as the\" Tree Planting Week \"; Iceland referred to as the\" Tree Planting Day students \"; India known as the\" National Tree Planting Day \"; France known as the\" National Tree Day \"; Canada known as\" Forest Week. \"
12 months of the year, a number of countries each month to celebrate Arbor Day:
Jordan\'s Tree Planting Day is January 15;
Spain\'s Arbor Day is February 1;
Iraq\'s Tree Planting Day is March 6;
France in March each year as a statutory \"Tree Planting Month\", at the end of the day as a \"Tree Planting Day\", the National Green climax on this day;
North Korea\'s Arbor Day is April 6; in April and October for the \"Tree Planting Month\";
Arbor Day in Australia is the first in May, Friday;
Venezuela in 1905 decided to May 23 each year for Arbor Day;
Finland\'s Tree Planting Day is June 24;
Mexico\'s laws and regulations in 1954, Arbor Day in June each year the rainy season to be held in September;
Tree Planting Day in India is the first week of July;
Pakistan\'s Tree Planting Day is August 9;
Philippines Tree Planting Day has 70 years of history, they have a year of September for the second Saturday of Arbor Day;
Tree Planting Day in Thailand is September 24; (also the National Day)
Cuba\'s Tree Planting Day is October 10;
Arbor Day is the United Kingdom November 6-12;
Italy in 1898 decided on November 21 each year for Arbor Day;
Syria is the Tree Planting Day in December last Thursday.
Senegal during the rainy season comes, a nationwide tree-planting activities began, lasted for up to six months, is the world\'s longest national Arbor Day.
3月12日是孙中山先生逝世纪念日。中山先生生前十分重视林业建设。他任临时大总统的中华民国南京政府成立不久，就在1912年5月设立了农林部，下设山林司，主管全国林业行政事务。1914年11月颁布了我国近代史上第一部《森林法》，1915年7月，政府又规定将每年“清明”定为植树节。
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1979年2月，五届全国人大常委会第六次会议根据国务院的提议，通过了将3月12日定为我国植树节的决议，这项决议的意义在于动员全国各族人民积极植树造林，加快绿化祖国和各项林业建设的步伐。将孙中山先生与世长辞之日定为我国植树节，也是为了缅怀孙中山先生的丰功伟绩，象征中山先生生前未能实现的遗愿将在新中国实现并且要实现得更好。1981年，在邓小平同志的倡议下，五届人大第四次会议通过了《关于开展全民义务植树运动的决议》。1990年3月12日，邮电部又发行了一套4枚“绿化祖国”邮票，第一枚为“全民义务植树”。
近代最早设立植树节的是美国的内布拉斯加州。1872年4月10日，莫顿在内布拉斯加州园林协会举行的一次会议上，提出了设立重视节的建议。该州采纳了莫顿的建议，把4月10日定为该州的植树节，并于1932年发行世界上首枚植树节邮票，画面为两个儿童在植树。
据联合国统计，现在世界上已有50多个国家设立了植树节。由于各国国情和地理位置不同，植树节在各国的称呼和时间也不相同，如日本称为“树木节”和“绿化周”；以色列称“树木的新年日”；缅甸称为“植树月”；南斯拉夫称为“植树周”；冰岛称为“学生植树日”；印度称为“全国植树节”；法国称为“全国树木日”；加拿大称为“森林周”。
全年12个月，每月均有一些国家欢度植树节：
约旦的植树节是1月15日；
西班牙的植树节是2月1日；
伊拉克的植树节是3月6日；
法国每年3月为法定的“植树月”，月末那天为“植树日”，全国绿化这一天进入高潮；
朝鲜的植树节是4月6日；4月和10月为“植树月”；
澳大利亚的植树节是5月的第一个星期五；
委内瑞拉1905年决定每年5月23日为植树节；
芬兰的植树节是6月24 日；
墨西哥1954年的法令规定，植树节在每年6月至9月的雨季举行；
印度的植树节是7月的第一周；
巴基斯坦的植树节是8月9日；
菲律宾的植树节已有70多年历史，他们把每年9月的第二个星期六定为植树节；
泰国的植树节是9月24日；（也是国庆日）
古巴的植树节是10月10 日；
英国的植树节是11月6日至12日；
意大利1898年就决定每年11月21日为植树节；
叙利亚的植树节是12月的最后一个星期四。
塞内加尔每逢雨季一到，全国性的植树活动随即开始，时间持续长达半年之久，是世界上植树节最长的国家。