Week of the year and weekday according to ISO 8601 This is an substitute for the %V and %u formats which are not implemented on Windows. In addition, the package offers functions to convert from standard calender format yyyy-mm-dd to and from ISO 8601 week format yyyy-Www-d. Software Imports: stringr Suggests: testthat Uwe Block <u.block.mz@googlemail.com> Uwe Block <u.block.mz@googlemail.com>, using an algorithm by Hatto von Hatzfeld <hatto@salesianer.de> GPL (>= 2) 2011-09-07 application/tgz http://CRAN.R-project.org/package=ISOweek