Ottawa and Eastern Ontario host a variety of events during the holiday season, including Christmas markets and light displays. Among them:

Ottawa Christmas Market at Aberdeen Square in Lansdowne from November 24 to December 23.
"Magic of Lights" at Camp Wesley Clover Park at 411 Corkstown Road from November 17 to January 6.
Winter Lights across Canada on Parliament Hill from December 7th to January 7th.
Billings Estate Historic Site - Home for the Holidays: December 2-23, Wednesday-Saturday, 10 a.m. to 5 p.m. Regular admission fees apply.

Christmas walk with light show at Saunders Farm at 7893 Blix Road through December 23rd.
Fly with Santa at the Canadian Aviation and Space Museum at 11 Aviation Parkway until December 26th. Price is $45 per person for a group of three passengers or $55 per person for a group of two passengers.
Stanley's Christmas Village at Old Maple Lane Farm at 2452 Yorks Corners Road on December 23rd.
Also available is the Alight at Night festival in Upper Canada Village, where more than a million lights decorate buildings, trees and fences, and horseback riding is offered. The festival runs from 17:00 to 22:00 on the following days: December 21-23 and December 26 to January 6.