Summer 2018 Starts Now — Summer 2018 starts 6:07 a.m. EDT, June 21, which is right now if our internet service provider’s clock is accurate.
This means that tilt of Earth’s semi-axis is most inclined to the sun in the Northern Hemisphere which is a solstice.
The axis will in a few moments slowly start reversing itself until it is the Southern Hemisphere that is most inclined to the sun.
This would be the start of our winter (and Argentina’s summer).
Today is the longest day of the year.
Summer 2018 Starts Now