President-elect Joe Biden talks to reporters at The Queen theater in...

President-elect Joe Biden talks to reporters at The Queen theater in Wilmington, Del., on Dec. 22. Credit: AFP / Alex Edelman via Getty Images

2020 was a landmark year. What will 2021 bring?

The pandemic makes any crystal ballgazing even hazier than usual, but here are some dates to watch for in the year ahead.

JAN. 5: GEORGIA SENATE RUNOFFS

Sen. Kelly Loeffler, left, and Democratic challenger Raphael Warnock appear during...

Sen. Kelly Loeffler, left, and Democratic challenger Raphael Warnock appear during a debate in Atlanta on Dec. 6. Credit: AP / Ben Gray

Two elections that will decide control of the Senate. If Georgia Democrats Jon Ossoff and the Rev. Raphael Warnock win, Democrats will control both houses of Congress and the White House when the Biden administration begins. If either Republican incumbent prevails — Sen. David Perdue or Sen. Kelly Loeffler — then Senate Majority Leader Mitch McConnell will hold blocking power over the Biden agenda.

JAN. 6: PRESIDENTIAL ELECTION'S FINAL STEP

Vice President Mike Pence will preside Jan. 6, 2021.

Vice President Mike Pence will preside Jan. 6, 2021. Credit: AP / Andrew Harnik

Congress meets to count the Electoral College votes. House Republicans are planning to mount a last stand for President Donald Trump, Politico reported. And Republican Sen. Josh Hawley of Missouri announced Wednesday that he will object during the certification process, saying on Twitter, "Millions of voters concerned about election integrity deserve to be heard. I will object on January 6 on their behalf."

JAN. 20: INAUGURATION DAY

At work Nov. 18 in preparation for Inauguration Day, at the...

At work Nov. 18 in preparation for Inauguration Day, at the Capitol in Washington. Credit: AP / J. Scott Applewhite

Joe Biden becomes the 46th president of the United States, and Kamala Harris becomes the first female vice president, as well as the first Black and South Asian American to serve in the position. What executive orders will Biden sign on day 1?

APRIL 30: A TRADITIONAL MARKER

President-elect Joe Biden talks to reporters at The Queen theater in...

President-elect Joe Biden talks to reporters at The Queen theater in Wilmington, Del., on Dec. 22. Credit: AFP / Alex Edelman via Getty Images

This date will mark 100 days since Biden took office — the traditional milestone to assess how much the country's new leader has accomplished at the start of their presidency.

JULY 23-AUG. 8: THE OLYMPICS RETURN

Women take a selfie with the Olympic rings in the...

Women take a selfie with the Olympic rings in the background in Tokyo on March 12. Credit: AP / Jae C. Hong

Get ready, sports trivia nerds, for the first modern Olympics to be held in an odd-numbered year. Assuming the pandemic is under control by then, Tokyo will host its Summer Games that were delayed from 2020.

SEPT. 11: A NOTABLE ANNIVERSARY

Mourners gather at the 9/11 Memorial & Museum in Manhattan...

Mourners gather at the 9/11 Memorial & Museum in Manhattan on Sept. 11, as the U.S. commemorated the 19th anniversary of the attacks. Credit: AFP / Angela Weiss via Getty Images

This day marks 20 years since the terrorist attacks of Sept. 11, 2001.

NOV. 1-12: COP26

The Johan Sverdrup oil field in the North Sea west...

The Johan Sverdrup oil field in the North Sea west of Stavanger, Norway, on Jan. 7. Credit: AFP via Getty Images / NTB Scanpix / Carina Johansen

That's the acronym for the next big climate conference, set for these dates in Glasgow, Scotland. Here's one sentence from the conference's website that lays out the high, tough stakes: "To ensure success, we need all countries to commit to reaching net zero emissions as soon as possible, and to significant further cuts by 2030."

NOV. 20: BIDEN'S BIRTHDAY

President-elect Joe Biden speaks about jobs at The Queen theater...

President-elect Joe Biden speaks about jobs at The Queen theater in Wilmington, Del., on Dec. 4. Credit: AP / Andrew Harnik

Biden will be the oldest president ever when he takes the oath. On this day, he'll turn 79.

Construction work zone safety … UBS Arena MTV Music Awards … Girls softball league Credit: Newsday

Gilgo-related search in Suffolk woods ... Urologist trial update ... Construction work zone safety ... Jericho fatal crash

Construction work zone safety … UBS Arena MTV Music Awards … Girls softball league Credit: Newsday

Gilgo-related search in Suffolk woods ... Urologist trial update ... Construction work zone safety ... Jericho fatal crash

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