Ceremonies continued through lunchtime and broke until Thursday morning, when the new national leadership is expected to be officially announced on the anniversary of the defeat of US -backed invaders at the Bay of Pigs in 1961.
Castro, 86, was due to step down on Thursday after 10 years in office.
Diaz-Canel has since a year ago been widely expected to take over from Castro, who made it clear his deputy was his personal choice.
Wednesday's announcement confirms the long-held expectation that Diaz-Canel would take over from Castro in a transition meant to ensure that the country's single-party system outlasts the aging revolutionaries who created it. But in the short term it is unlikely to herald major changes to the one-party system or state-dominated economic model.
It started with an oath of office read by Leydimara de la Caridad Cardenas Isasi, who at 19 is the youngest member of the more than 600 members of the National Assembly of People's Power.
Cuba's government is embracing social media as it convenes the National Assembly to elect a successor to President Raul Castro.
So whoever is elected president of the Council of State is top dog?
He spent decades climbing the party ranks, becoming Mr Castro's right-hand man in 2013.
Political observers said Diaz-Canel would be given the job of breathing life into the creaking economy, but would seek Castro's approval on major strategic decisions such as the relationship with the United States.
The new president is likely to be cautious at first, seeking to consolidate support among conservatives despite desire among young Cubans for faster development.
His departure from the presidency is nonetheless a symbolically charged moment for a country accustomed to almost 60 years of absolute rule first by revolutionary leader Fidel Castro and, for the past decade, his younger brother.
Diaz-Canel appears to be socially liberal and is considered an acceptable successor to the retiring elderly leaders who fought in the revolution.
He faces "myriad challenges on all fronts", said Richard Feinberg, who led Latin America policy in former U.S. President Bill Clinton's White House.
That image has begun to change slightly this year as Mr Diaz-Canel stepped into the moderate limelight offered by Cuba's Soviet-style state media.
The economy is suffering the effects of a crisis in oil benefactor Venezuela.
The new vice presidents would be Ines Maria Chapman, Beatriz Jhonson Urrutia and Roberto Tomas Morales Ojeda, who is now the health minister. Fidel Castro died in 2016 aged 90.
Later, the members of the assembly will vote for president of the country, with the results expected to be announced Thursday. Relations with Washington had been hostile since soon after Fidel Castro took the island on a sharply leftward path after the revolution.
Patra also noted that the Congress was in power for seven years after the blasts and asked what it had done during the period. Miffed over the cancellation of the event, many Congress leaders said they would go ahead with the inauguration anyway.
Trump was of the opinion that the U.S. could weigh rejoining the deal if it improved. "ZTE made false statements to the U.S. Commerce Department announced Monday its banning of ZTE Corp., a Chinese tech firm, from buying American components.
Though typically transmitted in health care settings, C. difficile infections can also be spread by mice that carry the pathogens. But they were concerned mice might actually pose a greater health risk because they live with us in houses and apartments.
He said there was a fuel leak in one of the engines when firefighters arrived and a small fire was quickly brought under control. NTSB Chairman Robert Sumwalt told a news briefing in Washington that one person had been killed, but declined to elaborate.
William Blair reiterated an "outperform" rating on shares of Netflix in a research note on Tuesday, December 6th. Aegis reissued a "hold" rating and issued a $230.00 target price on shares of Netflix in a report on Monday .
"Russia and China are playing the game, called devaluation of the currency, while the USA continues to raise its interest rates". A White House spokesperson could not be immediately reached for comment.
With the release of his most recent film, " Ready Player One ", director Steven Spielberg has made history . During the height of the comic's popularity, it outsold every other comic book but Superman .
Ancient computer systems and decades-old IT infrastructure might be the main culprit behind Tuesday's tax tech catastrophe. But as a result, the IRS says taxpayers now have until midnight on Wednesday, April 18th, to file and pay.
In the company news release, it explains that Johnson had spent a few days in Philadelphia and listened to the community. Johnson met with the two men on Monday and apologized to them personally, he said.
We're still waiting to see Kendrick's reaction to his big win, but for now, hip-hop salutes him for his historical accomplishment. The Pulitzer board said the album was a "virtuosic song collection" that captured "the modern African American life".
At the time, the authority said a major transmission line was damaged while contractors were clearing vegetation. Indians shortstop Francisco Lindor , who is from Caguas, Puerto Rico, contributed with a two-run home run.
Several hundred people sat or lay down on pavements, blocking roads leading to the parliament building and universities. On the same day, Human Rights Watch called on the authorities to "refrain from interfering into peaceful assembly".
The game has out-grossed the likes of Pandora, YouTube, and Hulu, and is now earning more than 1.5x as much as Candy Crush Saga . However, that would mean that the meteor will be hitting the map today, and so far there is no sign of a meteor strike.
He said the officers were assembled at the rural prison as quickly as possible and went in only when it was safe to do so. This riot is one of several violent instances that has taken place at Lee County Correctional Facility in recent years.
Suarez, in 2013-14, was the most recent Liverpool player to win the award, but he shared it with Ronaldo. Asked about his golden boot chances, he replied: "There's still games to go and we'll see what happens".
At the onset of the second meeting, Abe said he was able to have in-depth talks with Trump on the economy and North Korean issues. Pompeo is now the director of the Central Intelligence Agency . "Working on Trade and Military Security", he tweeted yesterday.
The Dinos' 44 first-quarter points set a franchise-record for scoring in a quarter as each starter tallied at least five points. FVV averaged 18.8 FanDuel points in 20.0 minutes per game this season and comes at a cost of $4,200 tonight in Game 2.
The release of the photos comes ahead of Israel's 70th Independence Day when Iran will also be marking it's National Army Day. The IDF has deployed increased air and ground forces in the Golan Heights to be ready for Iranian or Syrian reprisals.
Of course, with a new monster being added, there will be new weapons and armor sets that can be made from Kulve Taroth parts. Players will also be able to collect various Kulve Taroth materials that can be used to create shiny new armor sets.