As a result, parts of Indiana sometimes switch between the eastern and central time zones as the economic fortunes of their neighbors increase and decline. However, some counties decided to use daylight saving time, causing confusion about what time it was around spring and fall. During daylight saving time, the time changes from standard time to daylight saving time, so EST becomes EDT and CST becomes CDT depending on the state's location. As a result of the time change, dark mornings have caused an increase in car accidents after Eastern Time was adopted.
Most of Indiana, including the cities of Indianapolis and Fort Wayne, is in the Eastern Time Zone and observes daylight saving time, so there are two different clocks depending on the time of year. Most of the state uses Eastern Time, using Eastern Standard Time (EST) during the winter months and Eastern Summer Time (EDT) in the summer months, when daylight saving time is in effect. Some communities and cities may choose not to observe these official time zones and this site does not reflect all of those variations. The neighboring states to the east and north (Michigan, Ohio, and eastern Kentucky) are in the eastern time zone.
For those driving on the Indiana toll road (or Interstate 80 or Interstate 90 or whatever you want to call it), the time changes when a driver crosses from St. The Toll Road must change its signs to read “Entering Eastern Time Zone” and “Entering Central Time Zone”, respectively. The northwest and southwest ends of the state, which cover 12 counties, are in the central time zone and also observe daylight saving time, so there are two different clocks depending on the time of year. Some counties near the state's southwest and northwest border use central time, which changes between Central Standard Time (CST) and Central Summer Time (CDT).
The northwestern time zone boundary covers Lake, Porter, La Porte, Starke, Jasper and Newton Counties.