Do I need to wear sunscreen besides octave ultraviolet rays?

It is now advocated to apply sunscreen in winter. Although ultraviolet rays are weak, they should be applied, but if the skin is sensitive, you can also use physical sun protection methods such as wearing a hat.

Ultraviolet rays are not unique to the sunshine in summer, but exist every day, only from March every year, the amount of ultraviolet rays gradually increases. The data shows that in a year, the ultraviolet rays reach 90% in the midsummer from March to April, and the peak period of ultraviolet rays is from May to August. Even in winter, the amount of ultraviolet rays is 1/3 of that in summer.