All counties in the Nebraska Panhandle, as well as the counties listed below, are within the Mountain Time Zone: Arthur Chase Dundy Grant Hooker Keith Perkins
Western Cherry County, up to the boundaries of Crookston, Valentine, Cleveland, and Loup precincts, is contained within the Mountain Time Zone. East of this boundary, the county is within the Central Time Zone.
Aside from the areas listed above, the rest of Nebraska is within the Central Time Zone.
IANA time zone database The 2 zones for Nebraska as given by zone.tab of the IANA time zone database. Columns marked * are from the zone.tab. c.c.* coordinates* TZ* comments* UTC offset UTC offset DST Map
References
See also Time in the United States