When do silkworms lay eggs? [urgent need]

It's almost spring, and the silkworm babies hatch, grow into moths and lay eggs. This season is similar. In many places in the north, silkworms lay eggs every year. It's growing fast at present, and it's time to lay eggs. It is estimated that eggs will be laid on National Day.

The south may be different. There should be two seasons in a year, right?