Spring 2011 Start Date and Global Climate Context
The vernal equinox in 2011 occurred on March 20 at 23:21 UTC, marking the first day of spring in the Northern Hemisphere. The National Oceanic and Atmospheric Administration (NOAA) recorded this as the astronomical start date, with the Earth's axial tilt transitioning toward longer daylight hours in the Northern Hemisphere NOAA Climate Data.
Global land and ocean surface temperatures for March 2011 ranked as the 13th warmest on record at that time, according to NOAA's National Centers for Environmental Information. The first day of spring 2011 coincided with a La Niña event, which influenced regional temperature and precipitation patterns across the United States and globally.
Financial Market Activity on the First Day of Spring 2011
U.S. equity markets opened for regular trading on March 20, 2011, following the weekend. The Dow Jones Industrial Average closed at 12,080.38, reflecting a modest gain as investors assessed the aftermath of the March 11 earthquake and tsunami in Japan Forbes Market Archives.
Commodity prices showed notable movement on the first day of spring 2011. Light sweet crude oil futures traded around $99.29 per barrel on the New York Mercantile Exchange, pressured by the unfolding nuclear crisis at the Fukushima Daiichi plant. The U.S. Geological Survey and Energy Information Administration provided real-time data on global supply disruptions EIA Energy Updates.
Key Corporate and Regulatory Events Near the Spring Equinox
The U.S. Securities and Exchange Commission (SEC) maintained its standard filing and enforcement calendar on March 20, 2011, with public companies continuing quarterly reporting obligations. The first day of spring 2011 fell within the window when many firms were finalizing Q1 2011 earnings guidance SEC EDGAR Filings.
Tesla Motors, Inc. reported its production and delivery figures for the first quarter as part of its ongoing disclosure schedule. SpaceX, founded by Elon Musk, continued its Falcon 9 launch vehicle development, with NASA contracts advancing the Commercial Orbital Transportation Services program during this period SpaceX Mission Updates.