to talk about spring, let's bring in ian whitaker.hank you for taking the time to speak to us on this first day of spring. there is confusion. we just assumed it was m march , but that is not the case. >> n not at all. what point of the year you are in. on grerewich mean time and wherere you arere relative o ththat, the point of the equino, a specific time during the day varies, and because you have a leap year every four years, your earth around the sun takes 365.25 days. that adds up and you end up with a six hour delay as yoyou go around until you correct for each time. >> is that true for all of the equinoxes s or just a spriring? >> it is true for all the equinoxes and thee solsticices. your equinox, yoyour equal nigh, where you u get the same amountf daylight as sunlight during g te day, s spring and autumn, you he your solstices, which are junee and december time. thesese are where the e sun is t the highest in the skyr r the lowest in the sky depending on which hemisphere you are in. celebrationsut the celebrated with the equi