The Summer Solstice occurred just over a week ago on June 20, 2012, and I failed to note its arrival here at COTTonLINE. Say "hello" to summer which officially started on that day.
I was traveling and had other things on my mind. Nevertheless, observing the arrival of the longest day of the year is an important milestone. Humans have been celebrating it for tens of thousands of years, according to archeological findings at places like Stonehenge.
Early humans moved out of the equatorial zones and into those regions where knowledge of the seasons is important for hunting, gathering and planting, not to mention staying warm or migrating. At that point knowing when seasons would occur and how long they'd last became crucial to survival.