Noon is not “high noon” in various places around the world
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)
Vitamin D from the sun vs time of day which has the following graphic
