立春(Start of Spring)在中国农历中表示春天的开始。立春之后，白天变得更长，天气也愈发温暖：万物开始复苏，大地充满生机。人们常说"一年之计在于春”，农民在这个时节开始播种，为全年的丰收打下基础。中国人早在三千年前就已开始在立春这一天举行庆祝活动。数百年来，迎春一直是民间的重要习俗。在春暖花开的日子里，人们常常外出玩，欣赏春天的美景。
Start of Spring marks the beginning of spring in the Chinese lunar calendar. After the Start of Spring, the days get longer and the weather gets warmer: Everything starts to recover and the earth is full of life. It is often said that " a year’s plan begins in spring". Farmers start planting seeds at this time to lay the foundation for the whole year’s harvest. As early as 3,000 years ago, Chinese people began to celebrate the Start of Spring on this day. Welcoming spring has been an important folk custom for hundreds of years. In the spring days, people often go out to play and enjoy the beautiful scenery in spring.
在中国农历中，立秋(Start of Autumn)意味着夏天的结束和秋天的开始。立秋带来的首先是天气的变化，气温逐渐下降。人们看到树叶开始变黄飘落时，知道秋天已经来临。这就是所谓的“一叶知秋”。但此时酷热的天气并未完全结束，高温通常还会持续一段时间，被称为“秋老虎”。立秋对农民意义重大，这时各种秋季作物迅速生长、开始成熟，收获的季节即将到来。
In the Chinese lunar calendar, Start of Autumn means the end of summer and the beginning of autumn. After Start of Autumn, the weather firstly starts to change, and the temperature gradually decreases. The sight of leaves are turning yellow and falling reminds people that autumn has arrived, which is the literal sense of the idiom that the falling of one leaf indicates the autumn. However, during this period, the heat doesn’t entirely end, and it usually lasts a spell, which is called "Autumn Tiger". Start of Autumn is of great significance to farmers. It is at this time that various autumn crops grow rapidly and begin to mature, and the harvest is approaching.
The Winter Solstice, the shortest day and longest night of a year, marks the beginning of the coldest period of a year. After the Winter Solstice, with the lower temperature, people will have less outdoor activities. Since there is much less farming work to do, farmers are mainly busy for maintaining irrigation systems and protecting crops from being frozen, and in the meantime, make preparations for spring sowing in the following year.
Chinese people have always attached great importance to the Winter Solstice. In many places, people regard it as a festival and celebrate it in different ways. People in Northern China have the custom of eating jiaozi on this day, while people in Southern China have the tradition of eating tangyuan.