Perihelion does not fall on the exact same day each year because Earth's orbit is affected by the gravitational pull of other planets (especially Jupiter and Saturn). The date drifts by about . Over long timescales, perihelion slowly moves through the calendar.
The answer is January!
Since they are tilted toward the Sun in January, the timing of perihelion actually coincides with their summer, making Southern Hemisphere summers statistically slightly warmer than those in the North. The Role of Orbital Eccentricity during what month is the sun closest to the earth
Every year, the Earth reaches a point in its orbit called —derived from the Greek words peri (near) and helios (sun). This occurs roughly two weeks after the December solstice, typically falling between January 3rd and January 5th . Perihelion does not fall on the exact same