county_tzs: County time zone designations
Description
A dataframe containing the Olson/IANA time zone designation of each US county,
based on the county's Federal Information Processing Standard
(FIPS) code. This dataset was put together based on county FIPS codes as of
the 2010 US Census, using text from the two websites listed in "Sources" to
set the time zone designation for each county.
Format
A dataframe with 3,143 rows and 4 variables:
Details
Some counties cover more than one time zone designation. For
example, parts of Coconino, Navajo, and Apache Counties in Arizona
follow Daylight Savings Time, while other parts of the county do not. We
tried to designate county-level time zones based on the time zone used in
the majority of the county, based on population. When aggregating from
multiple monitors in a county, the time zone should be left in UTC until data
is aggregated, then the final value can be converted to local time, rather
than converting to local time before aggregating across a county.