May 22, 1981

Forget June 21. No matter what the calendar says about its being the first day of summer, the season in the New York City area really begins this afternoon as millions leave for their first trips to beaches and country lanes. Millions are expected to take to the roads in cars, while other travelers jam buses and trains. With an eye toward relieving congestion, the Long Island Rail Road will switch to its expanded summer schedule today. The schedule includes additional trains to the Hamptons and to stations that feed the ferries to Fire Island.

International A withdrawal of the nomination of Ernest W. Lefever as Assistant Secretary of State for Human Rights and Humanitarian Affairs has been requested by Senator Charles H. Percy, the Chairman of the Senate Foreign Relations Committee, according to Administration and Congressional officials. Aides to the Senator reported that Mr. Percy told White House officials that Mr. Lefever might ''hurt the foreign policy goals'' of the Administration. (Page A1,Column 1.) Syrian missiles must be removed not only from Lebanon but also from Syrian territory near the Lebanese border, Prime Minister Menachem Begin said in a television interview. The broadening of demands by the Israeli leader, which included the demand that Syria not fire antiaircraft missles from its own territory at Israeli planes over Lebanon, was expected to complicate efforts to resolve the conflict. (A1:4.)

Prime Minister Menachem Begin today broadened his public demands on Syria, declaring that its recently deployed antiaircraft missiles must be removed not only from Lebanon but also from Syrian territory adjacent to the Lebanese border. In addition, he said, Syria must make a commitment not to fire missiles from its own territory at Israeli reconnaissance planes operating over Lebanon. These demands, made in a television interview with the NBC News program ''Today,'' were expected to complicate diplomatic efforts to resolve the conflict over the missiles. Assad Rejected Earlier Demand President Hafez al-Assad of Syria has already rejected the earlier, more limited Israeli demands for removal of missiles deployed in the Bekaa Valley of eastern Lebanon since April 29, and has strongly criticized the Israeli leader for insisting on their removal.

Treasury Secretary Donald T. Regan and the Democratic majority leader in the House of Representatives, Jim Wright, held out the possibility today of making compromises that might permit agreement on a bipartisan tax bill. In an interview, Mr. Regan said the Administration wanted to write a bipartisan bill with mainstream House Democrats, not just with a group of conservative Democrats from the South.

For the second time in its meteoric 10-year history, the Amdahl Corporation, a small manufacturer of large-scale computers, is profiting from its ability to second-guess the huge International Business Machines Corporation. The evidence can be found on the bottom line: For the first quarter of this year, Amdahl reported an earnings upturn after a rapid twoyear decline. In large part, the company's problems were attributed to widespread speculation that I.B.M. would introduce a large-scale computer system so far advanced that Amdahl, its only major competitor, would be unable to keep pace. But when the I.B.M. product announcement came six months ago, Amdahl immediately proved its doubters wrong.