The beta version of iOS 4.3 has been out and about for a while now, and most reports have pointed towards mid-February for an official release. The folks at Macstories have a "reliable source" that may have nailed it down even further: February 14th at 10 AM PST.
That's right, Apple's not giving you flowers or chocolates for Valentine's Day; they may be giving you a nice iOS update. While it may not look pretty tied up in a bow, it may have some AirPlay fixes and iTunes app subscriptions among the usual bug fixes. While February 14th does fall on a Monday which is Apple's usual new release day, this is still just rumblings so don't completely count on them for the gift just yet.