I was in the ninth grade when this song hit the airwaves, It was such a happy song that you'd have a hard time believing that anybody could be blue if they tuned in to it and put the top down, cruised down old U.S. Hwy 31, that led almost straight into Panama City Beach and just let it play over and over, the sun warming your face, the air starting to smell of salt and coconut tanning lotion and hot tar...come back to 1969 with us for just a few minutes....
"Here Comes the Sun" is a song written by George Harrison that was first released on the Beatles' 1969 album "Abbey Road." Along with "Something" and "While My Guitar Gently Weeps," it is one of Harrison's best-known compositions from the Beatles era. The song was written at the country house of his friend Eric Clapton, where Harrison had chosen to play truant for the day, to avoid attending a meeting at the Beatles' Apple Corps organization. The lyrics reflect the composer's relief at both the arrival of spring and the temporary respite he was experiencing from the band's business affairs.
The Beatles recorded "Here Comes the Sun" at London's EMI Studios in the summer of 1969. Led by Harrison's acoustic guitar, the recording also features a Moog synthesizer, which he had introduced to the Beatles' sound after acquiring an early model of the instrument in California. Reflecting the continued influence of Indian classical music on Harrison's writing, the composition includes a series of unusual time changes.
Source: last two paragraphs from Wikipedia