According to Mayo Clinic decreased sun exposure has been associated with a drop in serotonin that can lead to sad. People are more sad during winter when the days are shorter. Sunlight can help people who suffer from nonseasonal depression, pregnant women with depression, people with anxiety related disorders and panic attacks.
5-15 min of sunligtht on your arms,hands and face twice a week is enough to enjoy the vitamin D- boosting benefits of sun.
Do not be afraid of sun. Although excess sunlight can contribute to skin cancers, a moderate amount of sunlight has cancer preventive benefits.