When is the first spring thunder every year?

The hibernation is the first sound of spring thunder, the so-called "spring thunder scared the insects", hibernation season, spring thunder began to sound hibernation in the ground hibernation of the stinging insects were awakened by the thunder, have to come out of the ground twelve months of the year, each month corresponds to a hexagram dawan month, including hibernation and equinoxes of the two festivals corresponds to the day of the thunder of the Dajiang a hexagram

Dajiang hexagrams are Trigram is the beginning of thunder in the sky, thunder in the sky ringing very image "d" refers to everything from the ground out of the meaning of grass and trees from the ground for the d, d also represents the vitality of the life force, on behalf of the vitality of the February is also a burst of energy in the month of a year of spring plowing

This began the hibernation of the beginning of the thunder of the saying only with the Along the Yangtze River basin south of the climate pattern coincides with the hibernation, is the third of the twenty-four solar terms. Doo refers to the ding sun reaches the yellow longitude 345 °, in the calendar March 5-6 intersection of the festival. Hibernation is the beginning of the month of Mao in the dry calendar.