In some cultures in the Northern Hemisphere, the astronomical March equinox (varying between 19 and 21 March) is taken to mark the first day of spring, and the Northern solstice (around 21 June) is taken as the first day of summer. In other traditions, the equinox is taken as mid-spring.
Circulation problems that cause dizziness. You may feel dizzy, faint or off balance if your heart isn't pumping enough blood to your brain. Causes include: 1  Drop in blood pressure.
Our ability to remain upright depends on a complex system of nerves in our eyes, ears and brain, as well as muscles that help us walk and maintain balance. A disturbance in that delicate system can cause dizziness. When a child says he feels dizzy, he usually means he feels light-headed and unsteady. Itâs not uncommon for healthy children, especially teens, to feel dizzy occasionally-especially when they get up quickly after squatting or sitting.