>>11744186>if you're lightskinnedtry to get 10-15 minutes of sunlight on a clear day, daily. if it's overcast, then stay out there all day if you want.
>if you're darkskinnedtry to get 30-60 minutes of sunlight on a clear day, daily. If it's overcast, then pray that the sun comes out soon and consider taking vitamin D supplements
Regardless, you should put on sunscreen on sun-exposed areas before you get your sun. It does virtually nothing to stop facilitation of Vitamin D, but does greatly diminish UVB exposure which leads to damaged/wrinkly skin and possible skin cancer.
