Iranians celebrated the 30th anniversary of the Islamic Revolution on Tuesday.
Tens of thousands took to the streets across the country to mark the anniversary of the revolution.
Many in the crowd carried placards reading "Death to America" and set alight US flags.
Addressing the rally on Tuesday, Mahmoud Ahmadinejad, said "Iran's nation welcomes real changes, Iran's nation is ready for dialogue, but dialogue in a just climate and with mutual respect."
Iran's president said: "The new US administration has announced that they want to produce change and pursue the course of dialogue.
US President Barack Obama on Monday renewed his call for direct talks with Iran, saying he hoped to create the conditions for face-to-face dialogue in the months ahead.
"It is quite clear that real change must be fundamental and not tactical, Ahmedinejad said.
"The Iranian revolution, although it started in Iran and is the core of the Iranian nation, it belongs to all nations anywhere in the world," he said.
"The Iranian revolution has brought great results. Over the past 30 years, Iran has been moving to the top. It has increased its speed in the fields of scientific research.
"Because of suppression and relying on a foreign country, the scientific research work had not been developing," the Iranian president said, referring to US and western sanctions imposed on Iran.
Earlier, Ahmadinejad asked the new US administration to apologize for the "crimes they have committed against the Iranian nation" before any change in relations can occur.
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Ahmadinejad advised Obama to shun the policies of former president George W. Bush, who refused talks unless Iran suspended its nuclear work and never ruled out a military option against Iran.
Washington and many western nations accuse Tehran of covertly seeking to develop atomic weapons, a charge Iran denies.
Each year, Iran commemorates the uprising and victory of the revolution on February 11, 1979. This year the anniversary falls on February 10 because it is a leap year on the Iranian calendar.
For the past 10 days Tehran has been festooned with flags to mark the return from exile in France on February 1, 1979 of Ayatollah Ruhollah Khomeini, founder of the Islamic republic. His return led to the revolution.
The Islamic Republic was proclaimed on April 1, 1979, and its constitution was adopted in a referendum on December 12 the same year.