Given that late country icon Dolly Parton was one of the most beloved people in the world — no, she really was — it’s a no-brainer that cities across the nation are making Sept. 25 Dolly Parton Appreciation Day. The date that’s chosen isn’t the date of her birth (Jan. 19, 1946) or her death at age 80 on Aug. 25, after a brief battle with cancer, but a date that will forever remind fans old and new of one of the legendary songwriter’s hands-down classic songs and her role in the beloved 1980 comedy film. In case you haven’t grasped it yet, 9/25 is kind of like “9 to 5.” On Friday in New York, Manhattan Borough President Brad Hoylman-Sigal…