BERKELEY, Calif. — The University of California, Berkeley, said on Thursday that it would permit the conservative author Ann Coulter to speak on campus in early May, just one day after it canceled her appearance that had been scheduled for next week.

But a student group that invited her rejected the new date, saying that the university was putting unreasonable conditions on the event and that Ms. Coulter would appear next Thursday, as originally planned.

At a news conference on Thursday, Nicholas B. Dirks, the chancellor, said the police had “very specific intelligence” of threats “that could pose a grave danger to the speaker” and others if it had allowed Ms. Coulter to appear next Thursday. Some recent speeches at Berkeley and other colleges have attracted violent protests.

The university had said on Wednesday that it would try to reschedule her appearance in September, but on Thursday Mr. Dirks said it had found “an appropriate, protectable venue that is available on the afternoon of May 2.”

He said the university would reveal the location when it finalized the details. “It can accommodate a substantial audience,” he added.

Ms. Coulter had vowed to defy the administration and speak at Berkeley anyway, and that appeared to force the university to schedule her appearance sooner than it had wanted to. “Ms. Coulter’s announcement that she intends to come to this campus on April 27 without regard for the fact that we don’t have a protectable venue available on that date is of grave concern,” Mr. Dirks said in a statement. “At the same time, we respect and support Ms. Coulter’s own First Amendment rights.”

That was still not good enough for the College Republicans, a student group that invited her to campus. The primary reason, said Naweed Tahmas, the club president, is that the university is requiring that the speech end by 3 p.m. Some colleges have asked provocative speakers to appear in the afternoons, rather than the evenings, to try to minimize the potential for violence.

Additionally, May 2 falls during what Mr. Tahmas called the university’s “dead week,” between the end of classes and final exams, a time when many students leave campus. Mr. Tahmas also said he anticipated that the administration would ask his group to pay a security fee for Ms. Coulter’s visit, which he said would be unfair because such payments were not required for liberal speakers.

“Ann Coulter will be coming regardless to speak at Berkeley on April 27,” he said.

Berkeley did not immediately respond to the group’s vow to keep the original date. It was unclear how Ms. Coulter herself felt about the new date, but she expressed displeasure with the university on Twitter, saying, “Berkeley just imposed an all-new arbitrary & harassing condition on my exercise of a constitutional right.”

She also posted a link to an article from the satire website The Onion with the headline “Berkeley Campus on Lockdown After Loose Pages From ‘Wall Street Journal’ Found on Park Bench.”

The Young America’s Foundation, a national conservative group that books her talks, did not comment after the chancellor’s announcement Thursday.

The original decision to cancel next week’s talk had been criticized not just by Ms. Coulter, but also by groups and thinkers across the political spectrum who viewed it as a letdown for free speech.

“Free speech is what universities are all about,” Robert Reich, a labor secretary in the Clinton administration and now a professor of public policy at Berkeley, wrote on his website. “If universities don’t do everything possible to foster and protect it, they aren’t universities. They’re playpens.”

Mr. Reich also let it be known what he thought of the speaker, while defending her right to speak. “How can students understand the vapidity of Coulter’s arguments without being allowed to hear her make them, and question her about them?” he said.

The Berkeley campus and surrounding areas have been the scene of clashes in recent months between small but militant right-wing and anarchist groups based in the San Francisco Bay Area.

On Saturday, the police arrested more than 20 people after skirmishes off campus between supporters and opponents of President Trump.

In February, a speech by the incendiary right-wing writer Milo Yiannopoulos, also sponsored by the College Republicans, was canceled after masked protesters smashed windows, set fires and pelted the police with rocks. The cancellation prompted Mr. Trump to post on Twitter, “If U.C. Berkeley does not allow free speech and practices violence on innocent people with a different point of view — NO FEDERAL FUNDS?”

Elsewhere, the police clashed with protesters on Tuesday at Auburn University, where the white nationalist leader Richard Spencer was speaking. The university had canceled the event on the grounds that it could turn violent, but a federal judge ruled that the speech should proceed because there was no evidence that Mr. Spencer advocated violence.

Ms. Coulter, a longtime conservative pundit and author, has often delighted in provoking liberals with comments many have deemed offensive.

In a Fox News interview in 2012, she said that single women “look to the government to be their husbands and give them, you know, prenatal care, and preschool care and kindergarten care and school lunches.”

In 2015, she said: “If you don’t want to be killed by ISIS, don’t go to Syria. If you don’t want to be killed by a Mexican, there’s nothing I can tell you.”

Ms. Coulter’s speaking fee at Berkeley is $20,000, and of that, $17,000 is being paid by the Young America’s Foundation. The other $3,000 is being picked up by BridgeUSA, an organization that promotes diverse speakers on campus.

Thomas Fuller reported from Berkeley, and Stephanie Saul from New York.