In the United States and the rest of the northern hemisphere, the first day of the spring season is the day of the year when the Sun crosses the celestial equator moving northward (on March 20th or 21st). This day is known as the Vernal Equinox.
A common misconception is that the earth is further from the sun in winter than in summer. Actually, the Earth is closest to the sun in December which is winter in the Northern hemisphere.
From L.A., drive north to the town of Lancaster via Route 14, better known as the Antelope Valley Freeway. Golden poppies bloom throughout the Mojave Desert region in March, but the 17,600-acre Antelope Valley Poppy Reserve claims the finest concentration of California’s state flower—not to mention glorious showings of fiddlenecks, creamcups, goldfields, and tidytips starting in late March.