See more information here https://www.freecomicbookday.com/Article/241387-Free-Comic-Book-Day-2020-Postponed
In the meantime:
Check your Public Library, you can access graphic novels on Hoopla, Overdrive and more with your library card!
Check the GNCRT A Quick Guide to Reading Library Comics At Home
http://www.ala.org/rt/gncrt/-guide-reading-library-comics-home
It lists many free sites for comics and graphic novels such as
Dark Horse, Read First Issues
"From Dark Horse’s newsletter: “We're offering over 80 first issue comics, along with a handful of full graphic novels, for free to read on Dark Horse Digital! To start reading, just sign up for free at digital.darkhorse.com with a valid email address, no credit card required. Enjoy!”
"Viz, the English-language publisher of many popular manga, offers the latest English-language chapters of four popular manga for free (all four are designated as Teen level by the publisher). Click on the publisher site below and scroll to the bottom of the page. The website above also advertises other manga for sale that offer free previews. Some sample previews may not be appropriate for all ages."
Also Check out Marvel free Comics
https://www.marvel.com/comics/discover/1626/read-these-free-comics
("From Marvel classics, to must-read runs, jump start your comic reading with these events, intro arcs, and storylines.")
("From Marvel classics, to must-read runs, jump start your comic reading with these events, intro arcs, and storylines.")
