When is the most beautiful pear flower?

Hello, landlord: "Like the strong wind in spring, the night comes and blows open the petals of ten thousand pear trees" is written that the snow in winter is as beautiful as pear flowers, but it is not in the true sense. Normal pears bloom in March in the south and April and May in the north. Unless they are specially treated, they will not bloom in spring.

Pears are white.