Your questions: Why did parts of Indiana just move to the Eastern time zone?
"I saw that several Indiana counties will move from the Central time zone to Eastern time. When did this happen?"
This was announced yesterday by the DOT, as noted in this article...
"The U.S. Department of Transportation announced Thursday a final rule moving five Indiana countries — Daviess, Dubois, Knox, Martin and Pike — from the Central to Eastern time zone. The five counties, which filed a joint petition for the time zone change, will observe Eastern time beginning Nov. 4, when daylight saving time ends.
"At the same time, the Department denied a separate petition from Perry County to also move from the Central to Eastern time zone.
"With the change, 80 of Indiana’s 92 counties and more than 5 million of the state’s 6.2 million citizens will observe Eastern Time."