Congress is back and it’s officially holiday season.

At 10 a.m. today, the architect of the Capitol will accept the 2016 Capitol Christmas Tree, which comes from the Payette National Forest in Idaho.

The tree will arrive at the West Front of the Capitol along First Street Northwest. Watch for HOH’s coverage on Tuesday.

Have decorations in your office or seen a room in the Capitol that got your attention? Email AlexGangitano@RollCall.com and we might show them off.

And stay tuned for a schedule of new member orientation events this week; it starts up again on Tuesday. Check out our coverage from the first week of orientation.

Holiday party season

Here’s a list of gatherings and celebrations this week: 

Tuesday

The Brooklyn Chamber of Commerce hosts Brooklyn Night, 6 to 8 p.m., 325 Russell Senate Office Building.

Featuring New York lawmakers, Sens. Charles E. Schumer and Kirsten Gillibrand and Reps. Yvette D. Clarke, Dan Donovan, Hakeem Jeffries, Carolyn B. Maloney, Jerrold Nadler and Nydia M. Velazquez.RSVP here.

WednesdayAirlines for America Holiday Reception, 4 to 6 p.m., Capitol HC-5.

Invite only.

ThursdayNaughty or Nice to benefit the Humane Rescue Alliance,  5 to 7 p.m., Ritz Carlton Georgetown, 3100 South St. NW.

Featuring a fashionable Santa and puppies.RSVP here.

Also happening this week…

The D.C. premiere of “Jackie,” a biographical drama about former first lady Jacqueline Kennedy in the days immediately following the assassination of President John F. Kennedy, is Thursday at the Newseum, 555 Pennsylvania Ave. NW, at 7:30 p.m. A reception is scheduled at 6:30 p.m. and a Q&A with actress Natalie Portman and director Pablo Larrain follow the screening.

Happy Birthday to

Sen. Michael Bennet, D-Colo., 52.

What’s going on?

Have any tips, announcements or Hill happenings? Send them to AlexGangitano@cqrollcall.com