Westworld's fourth season concluded on December 4, 2016.
 This shift is a full day in about 128 years (compensated mainly by the century "leap year" rules of the Gregorian calendar); as 2000 was a leap year, the current shift has been progressing since the beginning of the last century, when equinoxes and solstices were relatively late
 On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun

