Sorry, Apple tablet watchers: Looks like you have another 24 hours of torture to contend with this month, as widespread rumors across the Internet today are crooning that Apple’s “major” product announcement presumed to be on Tuesday, January 26 will now fall one day later instead.

“So that rumored Apple event everyone’s been jawing about these past few weeks? It’s on and it’s going to be a big deal,” claims AllThingsD’s John Paczkowski, who was the first to cite the date change to Wednesday, January 27, according to separate reports on both Engadget and AppleInsider.

Of course, no details on exactly what will be announced were given, but betting men feel confident that it will be the fabled Apple tablet at long last. The location of the event — San Francisco’s Yerba Buena Center for the Arts, which has hosted media-centric Apple events in the past — remains unchanged.

The Financial Times was the first to report that Apple had rented the stage there for “several days,” beginning Jan. 26. Fox News seemed to all but confirm the date in a report last week as well.

There’s been a dizzying amount of speculation and rumors about the Apple tablet in recent weeks, reminiscent of the pre-MacWorld Expo hype given to the rumored iPhone exactly 3 years ago. It remains to be seen if Apple’s January 27 unveiling will be as monumental an event as that infamous keynote address.

Adding more fuel to the tablet rumor fires, the French Apple site Mac4Ever is also claiming today that a new iPhone OS 4.0 beta SDK includes a “simulator” aimed at making it easier for developers to adapt their apps to different screen resolutions. They even go so far as to claim that some developers are allegedly already hard at work with the beta SDK in preparation for the tablet’s announcement later this month.