When President Trump was asked this summer whether he had Oct. 10, the date that the Nobel Peace Prize would be announced, circled on his calendar, he dodged the question.

“I can’t say. I mean, a lot of people say no matter what I did — because you know, I’m of a certain persuasion — no matter what I do, they won’t give it up,” Mr. Trump said.

“I’m not politicking for it,” he added. “I have a lot of people that are.”

If Mr. Trump didn’t have the date circled on his calendar, it has certainly been circling in his head — he has been lobbying for years. On Friday, the Norwegian Nobel Committee will announce the winner of the prize in Oslo, Norway’s capital, naming a laureate who aligns with its namesake, Alfred Nobel, the 19th-century Swedish industrialist.

The prize will be unveiled 48 hours after Mr. Trump announced what could be a major diplomatic triumph in ending the brutal war in the Gaza Strip, which the president is already claiming as one of the many conflicts he says he has helped resolve since taking office.

“BLESSED ARE THE PEACEMAKERS!” read the end of Mr. Trump’s social media post announcing a deal between Israel and Hamas after two years of war.

Still, Mr. Trump may not qualify this year at all. The prize typically rewards achievements from the year before, and in 2024, Mr. Trump had been elected but not yet sworn in as president. And the head of the committee said that the decision on this year’s laureate had been made on Monday.