For Día de Muertos, Ancestry.com is giving Mexicans and those of Mexican descent another way to celebrate. The genealogy site is allowing free access to 220 million historical records dating back to the 1500s, or the chance to find out if that crazy family legend is true.

According to Ancestry.com, this is the first time some of these records – which include birth, marriage, and death certificates – are available online. Ancestry teamed up with the Mexican Academy of Genealogy and Heraldry, who created microfilm of the records. They will be available for free until November 2, the end of Día de Muertos.

Ancestry.com is also offering a brand new Ancestry Mexico site, which will be in Spanish.

And if you’re really into getting more familiar with your roots, then you can also check out a webinar hosted by Family Search. On November 7 at 1 p.m. (Utah time), they will be hosting a class in English that will guide you through records so that you can find out the hometowns of family members who emigrated to the United States. The class will be available here.