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.
Homefacts City Report. Prospect Heights is located in Cook County, IL. The population is 16,228. There are 5 public schools in Prospect Heights with an average Homefacts rating of A-. The total crime rate for Prospect Heights is very low, and there are 10 registered sex offenders residing in the city.