The world's largest technology company did not specify what the event will be about in the invitation which reads simply "Spring Forward," a word play on the resetting of watches for daylight saving time.
               
Chief Executive Tim Cook said last month that the company plans to launch the smartwatch in April. The watch, which will let consumers check their email, pay for goods at retail stores and monitor personal health information, represents Apple's first major new product introduction since the 2010 launch of the iPad.

Apple Inc has asked its Asian suppliers to make 5-6 million units of its three Apple Watch models for the first-quarter, the Wall Street Journal reported, citing people familiar with the matter.

Taiwan-based Quanta Computer Inc is the main assembler of the Apple Watch, which is expected to be launched in April.
               
The entry-level Apple Watch Sport model accounts for half of the production order, while the mid-tiered Apple Watch will count for one-third, one person told the WSJ.
               
Apple Watch Edition, the high-end model with 18-karat gold casing, is expected to have relatively small orders in the first quarter but Apple plans to produce more than 1 million units per month in the second quarter, the Journal reported, citing the person.