Ancestry.com offers free July 4th weekend access to the 1940 census and the Sons of the American Revolution Membership Applications.
The site I visit most often when researching ancestors anywhere else, including in Canada, is Ancestry.com. I have a long-standing world subscription with Ancestry.ca, which allows me to search through their records anywhere in the world. I never fail to find something new every time I go into the site.
Ancestry.com is offering a free search of their 1940 United States Federal Census on the July 4th celebration weekend, as well as free access to the Sons of the American Revolution Membership Application.
This free access will start July 1st and continue throughout the holiday weekend.