Returns a dataframe version of the Wikipedia timezone table with the following columns:
timezone -- Olson timezone
UTC_offset -- hours between local timezone and UTC
UTC_DST_offset -- hours between local timezone daylight savings and UTC
countryCode -- ISO 3166-2 country code
longitude -- longitude of the Olson timezone city
latitude -- latitude of the Olson timezone city
convertWikipediaTimezoneTable()
Dataframe with 399 rows and 6 columns.
Older named timezones from the table which are linked to more modern equivalents are not included in the returned dataframe.