Time Zone Database Information

Provides an up-to-date copy of the Internet Assigned Numbers Authority (IANA) Time Zone Database. It is updated periodically to reflect changes made by political bodies to time zone boundaries, UTC offsets, and daylight saving time rules. Additionally, this package provides a C++ interface for working with the 'date' library. 'date' provides comprehensive support for working with dates and date-times, which this package exposes to make it easier for other R packages to utilize. Headers are provided for calendar specific calculations, along with a limited interface for time zone manipulations.

tzdb

tzdb is a developer focused R package with two purposes:

• It ships an up-to-date copy of the IANA time zone database files.

• It provides low-level access to the C++ library, date.

To use the C++ API supplied by tzdb:

• Add tzdb to both Imports and LinkingTo.

• Call tzdb::tzdb_initialize() from your .onLoad().

• Access the date API through #include <tzdb/*.h> where * is replaced with the date header you want to use.

Note that while tzdb/tz.h declares many functions and types, most of their implementations are not present in the header file. This means that the functions in tzdb/tz.h are not safe to call from your R package. Instead, the most critical helpers have been exposed in a safe way in tzdb/tzdb.h. Use these instead.

Installation

You can install the released version of tzdb from CRAN with:

install.packages("tzdb")

And the development version from GitHub with:

# install.packages("pak")
pak::pak("r-lib/tzdb")