A new listing for a generic “Corporate Meeting” scheduled for June 5 through 9 at San Francisco’s Moscone West could prove to be a placeholder for Apple’s annual Worldwide Developer’s Conference, reports “AppleInsider” (http://www.appleinsider.com).

The convention center calendar shows Sunday, June 5, through Thursday, June 9, set aside for an unnamed meeting labeled as a “convention/tradeshow.” While the generic listing is no guarantee of the WWDC 2011 dates, the second half of June is booked with five different events, suggesting that Apple’s annual event will occur earlier in the month, notes “AppleInsider.” The June 5 bloc set aside at the Moscone Center has been reserved at Moscone West, where Apple has historically held WWDC.