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.
Sponsored Topics. Prospect Heights is a city in Cook County, Illinois, United States, which is a suburb of Chicago. The population was 17,081 at the 2000 census. Prospect Heights is located at 42Â°6â²20â³N 87Â°55â²41â³W / 42.10556Â°N 87.92806Â°W / 42.10556; -87.92806 (42.105576, -87.928168).