When it rains at 4: 08, dial three numbers.

Grain Rain is the sixth of the 24 solar terms. During the Grain Rain season around April 20th of the Gregorian calendar every year, rainfall increases in most parts of the country, so the figure stated by Grain Rain at 4: 08 is 420.

The four seasons refer to spring, summer, autumn and winter, and the eight festivals refer to beginning of spring, vernal equinox, long summer, summer solstice, beginning of autumn, autumnal equinox, beginning of winter and winter solstice.

Four point one year old, three months in spring, summer, autumn and winter, two solar terms and twenty-four solar terms per month.