"Spring forward," reads Apple's (AAPL +0.3%) invite for a an event to be held at 1PM ET on Monday, March 9 at San Francisco's Yerba Buena Center. Many expect the event to revolve around Apple Watch, which is set to begin shipping in April, and for which full pricing details haven't yet been announced. Developers have already begun writing Watch apps - for now, they'll have to interact with complementary iPhone/iPad apps - via Apple's WatchKit SDK. Read more