Do you wear SPF when UV index is 0?

Not always. I live in Dk, so it depends on the season In the winter, we have so few hours of light and some days it's still night when I bike to work and night again when I bike back home. I don't need sunscreen as my office is facing North In the Spring or Summer I will wear sunscreen in the morning. If the UV index is 0 on my way home, I won't reapply Before anyone starts calling me irresponsible or accusing me of promoting skin cancer, I must say that most doctors in Scandinavia recommend sun exposure (if there's any) without sunscreen 15 min a day in the winter season.

I thought the uv index was 0 only at night. that is fascinating

Very rarely is uv index 0 in Australia. 🤣 Normally its between 4-7 in winter/Autumn, 8-12 in spring and 12-16 in summer. 😬😨 But the off chance that its 0 I dont apply or reapply. Now before anyone calls me irresponsible please have look at what a UV index actually means. I have an Australian app that tracts UV index throughout the day by the hour and weather. It gives you the time spf is highly required which usually starts around 0930 to 1630. Much more accurate than the UV index in the weather app too

I only apply & reapply sunscreen 🌞when the UV index is above 2. I'm on a sunny, tropical island 🏝️

No, I don't, spf safes my skin from UV and if this one is 0 what will do spf?