* Big upswing in all businesses, mostly in U.S., Asia
* Furniture Mart did $5.2 mln sales on Tues night, up 54 pct
* Berkshire AGM Saturday, expecting 40,000 (Adds detail, quotes)
April 30 Berkshire Hathaway Inc (BRKa.N) (BRKb.N) has seen a big upswing in all of its businesses starting in March, billionaire Warren Buffett said in an interview with Fox Business Network.
"What a difference a year makes, yes," Buffett told Fox Business Network anchor Liz Claman. The interview will be aired on Friday morning.
"And we have seen in all our businesses a big upswing starting in March. It was creeping up a little until then, but in March, around the world, we saw real -- a real change," he added.
Buffet said on Tuesday night alone, Berkshire's unit Furniture Mart transacted $5.2 million worth of business.
"Now, on a normal Tuesday, we do $700,000. So it was $5.2 million, which was up 54 percent from a year ago," Buffett said.
Buffett said most of the business upswing was seen in the United States and Asia Pacific but not much in Europe.
Berkshire Hathaway will hold its annual shareholder meeting on Saturday in Omaha, Nebraska.
The meeting attracted 35,000 people last year. Along with the annual meeting for Wal-Mart Stores Inc (WMT.N), it is one of the most heavily anticipated and attended galas in corporate America, drawing investors and media from all over the world. [ID:nN28167352]
Buffett expects close to 40,000 people to attend this year's annual shareholder meeting.
"There were 12 people here in 1981," he said. (Reporting by Sakthi Prasad in Bangalore; Editing by Lincoln Feast)