It is of Greek origin, and the meaning of Ellen is sun ray. Originally a variant of Helen, but now more closely associated with Eleanor. First used as an independent name in the 16th century. Nell is a pet form. English actress Ellen Terry; American actresses Ellyn Burstyn, Ellen Barkin, Ellen DeGeneres.
The days are longer in the summer because our section of the Earth is tilted towards the sun during the summer. Because the tilt of the Earth puts us faces the sun during summer, thus giving us more light. This effect is more and more noticeable the closer to the poles that you go.
What this means is that some places on Earth are hotter than others. For example, it is usually hotter in the Middle East and India than in America or Europe. The length of the summer season (three months) is still prevalent in most locations. However some countries experience some rainfall in the early or late periods of the season. For this reason it can sometimes be difficult to determine when the period has concluded.