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tzdb is a developer focused R package with two purposes:
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It ships an up-to-date copy of the IANA time zone database files.
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It provides low-level access to the C++ library, date.
To use the C++ API supplied by tzdb:
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Add tzdb to both Imports and LinkingTo.
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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.
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")