They all have 4 weeks, but February is the only one to have exactly 4 weeks (except in Leap years when it has 4 weeks and 1 day). April, June September and November each have 30 days = 4 weeks and 2 days. The rest of the months each have 31 days = 4 weeks and 3 days.
Prospect Heights, IL Other Information. 1  Located in COOK County, Illinois. 2  Prospect Heights, IL is also known as: 3  PROSPECT HTS, IL.
Arlington Heights, Illinois. Arlington Heights is a town in Cook County and Lake County in the U.S. state of Illinois. A suburb of Chicago, it lies about 25 miles (40 km) northwest of the city's downtown. The population was 75,101 at the 2010 census.