I think it is best to say the convention dates below are tentative.

2021 Dream Book
April 15, 2021
A tradition in itself, the Dream Book will feature this year’s line of Keepsake Ornaments, as well as fan features and stunning visuals that bring Keepsakes magic to life. And don’t forget—Keepsake Ornament Club members get a chance to see the Dream Book first.

Hallmark Ornament Premiere Event
July 10-18, 2021

San Diego Comic-Con@Home
July 23-25, 2021

Official Star Trek Convention in Las Vegas (STLV)
August 11-15, 2021
The Rio Suites and Resort
3700 W Flamingo Rd.
Las Vegas, NV 89103

Planet Comic Con (PCC)
August 20-22, 2021
Kansas City Convention Center – Bartle Hall
301 West 13th St.
Kansas City, MO 64015

Hallmark Ornament Debut Event
October 2-10, 2021

New York Comic Con (NYCC)
October 7-10 (Tentative)
Javits Center
655 W 34th St.
New York, NY 10001

Comic-Con Special Edition
November 26-28
San Diego Convention Center
111 W Harbor Dr.
San Diego, CA 92101

Hallmark Trim the Tree Event
December 1-5, 2021

Emerald City Comic Con (ECCC)
December 2-5, 2021
Washington State Convention Center
705 Pike St.
Seattle, WA 98101

Hallmark: “In light of the uncertainty related to the pandemic, we have decided not to host an in-person KOC Convention in Kansas City in 2021.”

For more convention updates go to The Pop Insider.