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.
Over time, a vitamin B1 deficiency can lead to cardiomyopathy, or enlarged heart, which then interferes with blood flow to the brain, causing dizziness. This is a serious condition requiring medical attention. If you start to feel dizzy, be sure to look out for these clear signs you're about to faint.