Way History: 199976934

converting some public domain tags to CC0-1.0

EDGE_ID	460750010
license	CC0-1.0
source	https://publications.newberry.org/ahcbp/downloads/united_states.html
source:name	Newberry Library Atlas of Historical County Boundaries

Added changes to U.S. time zone boundaries from 2000 to present

EDGE_ID	460750010
license	CC0 / public domain
source	https://publications.newberry.org/ahcbp/downloads/united_states.html
source:name	Newberry Library Atlas of Historical County Boundaries

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