(CNN) - It's moving time. Both parties officially transitioned into to their respective convention arenas on Monday, a little more than a month before thousands flock to North Carolina and Florida to take part in their parties' largest gatherings.
The Democratic National Convention Committee received the key to the Time Warner Cable arena in Charlotte. The committee said the event marked the next "milestone" in its planning for the convention, scheduled for September 4-6.
- Follow the Ticker on Twitter: @PoliticalTicker
- Check out the CNN Electoral Map and Calculator and game out your own strategy for November.
Now that the DNCC has the keys, it can start the physical construction of turning the arena into a convention hall.
"We still have a lot of work to do between now and September, but we have a great arena to work with, fantastic local partners, and an experienced and talented construction and architect team," said Steve Kerrigan, the committee's CEO, in a statement.
The arena is home to the NBA's Charlotte Bobcats and American Hockey League's Charlotte Checkers. Built in 2005, the facility can seat up to 20,200 for a college basketball game. Tens of thousands are expected to attend the convention, including nearly 6,000 delegates, up from 4,419 delegates at the 2008 convention in Denver, Colorado.
While much of the week's events will take place at the arena, the final night featuring President Barack Obama will take place at the Bank of America Stadium in Charlotte, which seats up to 73,778.
The Republican National Convention committee, which hosts its event August 27-30, also kicked off its move-in Monday, this time at the Tampa Bay Times Forum, an arena that was first built in 1996 and later renovated in 2011.
Among its sports teams are the National Hockey League's Tampa Bay Lightning and the Arena Football League's Tampa Bay Storm.
"For months and months, thousands of small details, plans and preparations have been going on internally, but there hasn't been much for the public to watch," said GOP convention chair Alec Poitevint in a statement.
He continued: "Starting today, you will begin to see a small army of carpenters, electricians, glass installers, movers, painters, stagehands and laborers descending on the 670,000-square-foot Times Forum to turn it into one of our democracy's greatest icons: the site of a national political convention."
Republicans said they expect to draw 50,000 people during the week, including 2,286 delegates and 2,125 alternate delegates.