Usually, the time for babies to sunbathe in the sun is related to the season and time period, and cannot be generalized. The purpose of baby sunbathing is to prevent rickets, i.e., to supplement vitamin D, and at the same time increase outdoor exercise Helps the baby’s physical health. Sunbathing is usually recommended at 9-10 am and 16-17 pm as the best, and should try to avoid 12-16 pm when the sun is strong. Generally in winter, you can sunbathe for 1 hour a day, while in April-October, 30 minutes a day is enough, and it is recommended that the cumulative time of sunbathing should not be more than 2 hours a day. At the same time when sunbathing should also pay attention to whether the baby has sweating, pay attention to replenish water. In addition, should avoid sunbathing through glass windows, glass windows can isolate the ultraviolet rays, and the real effect is ultraviolet rays, through the glass, then can not play the role of sunbathing.