10 hPa Global Stratospheric Calendar at Stonehenge and Giza

: This article is a pioneer quest for a possible link between the sunset alignment points of Stonehenge and Giza and natural seasonal atmospheric phenomena – global stratospheric calendar. Analysis of the sunset alignments of Giza and Stonehenge reveals marks of identical time frames from March 30th to April 7 th and from October 21st to November 7 th. Analysis of the constant pressure chart 10 hPa on the northern and southern hemisphere for the period of 2015-2019 shows that the maximal similarity between northern and southern hemispheric 10 hPa geopotential height shapes occurs approximately in periods from March 30th to April 7 th and from October 21st to November 7th. Ancient civilizations might’ve even possessed an advanced knowledge of a global stratospheric calendar and unknown methods of registering changes of upper air properties. Several indications of possible extinct human electroreceptivity were provided.