and July 21, 2019 too…
The sun finally sits directly overhead at solar-noon here … just twice a year.**
Go outside at solar noon tomorrow (12:55 PM + 13 sec) … and notice that our Solar Noon sun casts NO SHADOW for vertical telephone poles etc…
Today or tomorrow? It depends on your latitude in Yucatan. I quote data for Merida.
and yes … One Maya city kept a calendar this way – by having a deep hand-dug well with perfectly perpendicular walls … and the bottom of the well was illuminated just twice a year … around May 22 … and July 23 …
“around” ?? … The actual dates, like the March & Sept Equinox dates, for our special sun overhead at Solar Noon date changes every because of the Leap Year issue … where our calendar year is off by 1 day every 4 years. (The length of a Solar year is not 365 days … It’s 365.2422 days.)
This 1 day error every 4 years is why the Maya Calendars get a full month off from the sun’s actual positions every 125 years … 😉
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Feel free to copy while giving proper attribution: YucaLandia/Surviving Yucatan.
© Steven M. FryRead-on MacDuff . . .