Did you click the link?
Is NASCAR.com being lazy?
Every sport has changed or revised their schedule since March; Indycar hadn't started and was at St. Petersburg;
NASCAR finally is back at Atlanta this weekend when the Pandemic struck suspending everything..... Bristol's spring race weekend is normally April, not the end of May/1st of June;
the schedule goes from here in Atlanta, to Miami, then Martinsville is a mid-week race, now that Virginia has eased their lockdown which cost them Richmond's spring date.....
ignore the NASCAR site, because it already shows Atlanta, Miami, Martinsville, and Talledega through the 21st....then the Doubleheader at Pocono to conclude June as originally scheduled;
Kansas, Michigan-1, and Dover have not been made official when they'll be run yet, and there has been rumblings that Dover is considering a double-header in August much like Pocono....
then when does NBC/NBCSN take over in July since Fox originally ends their season at Sonoma (which became the 2nd 500K race last Thursday night in Charlotte) now that Tokyo has been realigned to 2021.... the original schedule had a 2 weekend hold after Michigan-1 due to Olympic coverage now that Chicago had their date this year transferred to Darlington when NASCAR restarted the 17th of May.
everything that was from March through May... is now;
NHRA AND F1 AREN'T returning until July, either