The Navajo Nation extended its curfew this weekend, April 24 at 8 p.m. to April 27 at 5 a.m. (MDT) as positive COVID-19 cases on the Nation continue to rise.The Navajo Nation extended its curfew this weekend, April 24 at 8 p.m. to April 27 at 5 a.m. (MDT) as positive COVID-19 cases on the Nation continue to rise.