Way History: 199989725

Added changes to U.S. time zone boundaries from 1919 to 1923

source	https://books.google.com/books?id=WyYXAQAAMAAJ&pg=PA293
source:1	https://books.google.com/books?id=WyYXAQAAMAAJ&pg=PA556
source:2	https://historical1-stg.arcgis.com/arcgis/rest/services/USGS_Historical_Topographic_Maps/ImageServer/

59 nodes

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