The vernal equinox kicks off today, marking the start of the spring season
It signals the equal length of the day and night time. After the equinox, the sun moves northwards, resulting in gradually longer day time in the Northern Hemisphere and longer night in the Southern Hemisphere.
Here are the chinese poem about spring equinox.
春分雨脚落声微
柳岸斜风带客归
As spring showers lightly fall,
The wind along the willow bank guides travelers home.