In Spokane, Washington the window is even smaller and you have to wait till the 9th of April at noon to start making Vitamin D. You need to know about which day and what time of day you can make vitamin D. Here are a few general rules I follow to make sure I get vitamin D from the sun anywhere in the US.
1. I do go outside at noon or as close as possible for 15 minutes.
2. I expose skin to the sun (being modest).
3. I go outside in the spring and summer.
You can only get vitamin D in the spring and summer in most places in the US.
I do not go out early in the morning or later in the evening. (you will not make any vitamin D)
Copyright 2012 Marshall