Each year around May 20 in the current era – the Sun and Pleiades come together as they cross the Zenith point (meaning they are directly overhead) at 20 degrees North Latitude at high Noon.
This is a time the Mayans called the “Days of No Shadows” because no shadows are cast when you have a straight stick in the ground or a person standing perfectly straight. There are no shadows cast by the pyramids either…
The Sun and Pleiades together on these days happens for about 144 years every 26,000 years. It is happening NOW!
Read the full article with lots of great images including the light magic on the pyramid and Solar Zenith Tube in this PDF link – May 20 Zenith at Kukulkan