199 1 the exact time of spring.

Beginning of spring time that year was 199 1 February 4th.

199 1 beginning of spring time is1991February 20, 2004, and beginning of spring time is1February 20.

Beginning of spring is the first of the 24 solar terms. Standing means "beginning", and spring represents warmth and growth. Twenty-four solar terms were originally formulated on the basis of "variable stars". When the bucket handle of the Big Dipper points to the shade, it is beginning of spring.