Traditional Culture Encyclopedia - The 24 Solar Terms - Why is 20 19 lunar May 1 already a month, shouldn't it be April in Mitsuki?

Why is 20 19 lunar May 1 already a month, shouldn't it be April in Mitsuki?

The change of year and month is based on solar terms, such as beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, Long Summer, Xiaoman, Miscanthus, Summer Solstice, Slight Summer and Great Summer.

Among them, beginning of spring is cloudy in January, hairy in February, clear in March, and long in summer and April.

May 1 It's still March in Chen Wu, and it won't be April until May 6th when it meets the long summer.