solsta lujvo

x1 is a solstice.


In notes:

dornilteikezraifau
f1 = r1 = x1 (event; perhaps: spacetime coordinates) is a solstice of extreme r3 = x2 ("ka" construct or season; default: "ka zmadu", which means "Summer solstice", unless context makes this interpretation untenable) at location/of or for celestial body/object d3 = x3 with respect to orbit/sun x4.