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.
Prospect Heights, IL Real Estate & Homes for Sale Homes for Sale in Prospect Heights, IL have a median listing price of $349,900 and a price per square foot of $168. There are 71 active homes for sale in Prospect Heights, Illinois, which spend an average of 60 days on the market. Some of the hottest neighborhoods near Prospect Heights, IL are Central Business District, Strathmore in Buffalo Grove, The Boardwalk, Landwehr Estates.