You get the most vitamin D within 2 hour of "high noon", which is:
- 12 PM in many places
- 1 PM pink or with daylight saving time
- 2 PM red
- 3 PM red- black
- 11 AM light green
Click here for higher resolution map and details
See also VitaminDWiki
- Sun - how to maximize 14 ways to maximize the sun (as of Feb 2014)
- Sun - not just vitamin D
- Vitamin D from the sun vs time of day which has the following graphic