TEHRAN, Feb. 11 -- Iran will pursue its "peaceful" nuclear technology and resist any kinds of threat against its interests in nuclear talks with the world powers, President Hassan Rouhani said in the occasion marking the 35th anniversary of 1979 Islamic revolution on Tuesday.

"I announce this clearly that threats against Iranian nation is worthless and childish, since our nation resisted different kinds of enemy's threats over the past 35 years and emerged victorious," Rouhani said.

The Iranian president urged West to change its rhetoric in dealing with Iran, arguing that the language of threat will lead to solidarity among Iranians and unity against West.

He denounced sanction pressures against his country "as oppressive, illegal and wrong," saying that West can no longer continue these sanctions against Iran.

"In the recent talks, we stroke the first blow on the sanctions regime," said Rouhani.

Iran and the world powers clinched a deal last November, whereby Iran agreed to oxidize and dilute its 20-percent enriched uranium stockpile in return for a limited ease of western sanctions.

The Iranian president further criticized occasional military threats by the U.S. officials, saying that the military threats against Iran are mere "illusions" and "nobody in the world can keep military option against Iran on the table."

The president's remarks were followed by an applause from the large crowd gathered in capital Tehran's Azadi (Liberty) square.

He said Iran is determined to continue its advancements in acquiring "peaceful" nuclear technology.

"The movement of Iranians toward the peaks of science and technology, including the peaceful nuclear technology, will be continuous," he added.

Iranian president called nuclear negotiations "a historical test" for the United States and Europe, and asked the world powers to consider Iran's rights in the upcoming talks.

In case the P5+1 group, namely five permanent UN Security Council members plus Germany, recognize Iran's rights, heed shared interests, interact and negotiate on the basis of mutual respect, they will receive "positive response from Iran," Rouhani said.

Hundreds of thousands of Iranians held nationwide rallies in support of the Islamic establishment and celebrated 35th anniversary of the Islamic revolution on Tuesday.

People in major Iranian cities swarmed to the streets, carrying flags and banners in support of the establishment and images of late founder of the Islamic republic Ayatollah Ruhollah Musavi Khomeini and his successor, incumbent Iran's leader Ayatollah Ali Khamenei.

The 1979 revolution toppled the U.S.-backed regime of Shah and brought the country under the leadership of Ayatollah Khomeini, an event seen as a turning point in Iran's history.