As of 7:02 a.m. today, spring had officially arrived. The first
day of spring, the vernal equinox, has 12 hours of daylight and
12 hours of darkness. After today, the length of daylight will
increase until the first day of summer, the summer solstice,
arrives. This year, summer will arrive at 1:04 a.m. on June
21st. After the first day of summer, the length of the day will
again start to decrease.