The publication revealed the dates via Twitter, citing an unnamed source:
Facebook eyeing IPO dates of either May 17 or May 24. Deal time fluid & dependent on SEC review of @Instagram acquisition – source
Facebook considering shorter 10-day IPO road show to launch deal. Some bankers concerned shorter road show may harm deal marketing. –source
Facebook expecting SEC guidance on @Instagram deal by end of April. –source
We won't know Facebook's actual valuation until right before the offering is made, which typically occurs about three months after a firm files for its IPO. The rumors have started for when Facebook will go public, and soon speculation about the valuation number will hit an all-time high. Will it be $100 billion?