blog.passwird.com/ has published the The Big Black Friday Roundup For 2020 with a list of all the upcoming holiday sales, and their start / end dates.

• Macy’s 2020 Black Friday Ad Scan
• Amazon Holiday Toy Catalog
• Kohl’s Black Friday Preview
• Best Buy 2020 Black Friday Ad Scan
• Target 2020 Ad Scans
• Costco 2020 Holiday Catalogue