you are correct on some of it. dec. 21 is the shortest day of the yr, and june 21 is the longest. since we are past june 21st now the days will slowly get shorter now. if you put a flowering plant outdoors now it would revert to vegitive growth. normally mj wont start to flower untill the midle of august sometime. the opposite is true south of the equator, our summer is their winter. hope this helps.