What moon phases do traditional festivals in China correspond to?

Spring Festival: On the first day of the first month, the moon is a new moon. At this time, the moon is located between the earth and the sun, with its dark side facing the earth and appearing almost at the same time as the sun, so it can't be seen on the ground.

Dragon Boat Festival: On the fifth day of May, the moon phase is moth-eyebrow month. In the early evening of the month, it appears in the western sky, and the moon faces west, showing an anti-C shape.

Double Ninth Festival: On the ninth day of September, the moon phase is the first quarter moon. When the sun goes down, the moon is already overhead, and it won't set until midnight. At this time, the moon illuminated by the sun can just see half.

Mid-Autumn Festival: August 15, full moon. The earth is between the sun and the moon, and the half moon illuminated by the sun faces the earth. At this time, we saw the full moon. Because the moon is just opposite to the sun, the sun sets in the west and the moon rises in the east. When the moon sets, the sun rises in the east, and you can see the bright moon all night.

Extended data

Moon phase recognition

Assuming that the full moon is a circle, no matter how the phase of the moon changes, the connecting line between its upper and lower vertices must be the diameter of the circle (the phase of the moon is irregular during an eclipse). When the outer edge of the moon phase we see is close to the inverted C letter shape, then the moon phase at this time is before the fifteenth day of the lunar calendar. On the contrary, when the outer edge of the moon phase we see is close to the C letter shape, then the moon phase at this time is after the fifteenth day of the lunar calendar.

The phase of the moon is related to the tide of the ocean, because the tide is directly related to the gravity of the moon, for example, a full moon will cause a spring tide.

The change of tides directly affects people's lives. Military affairs, tourism, ocean navigation, marine fisheries, mariculture, marine engineering, scientific experiments and various coastal production activities are all affected by tides.

Baidu encyclopedia-moon phase