doy.RdThe day of year (aka yearday of doy) is an integer index ranging from
1 (representing January 1) to 365 or 366 (representing December 12).
The ISO day of year ranges from 1 (representing the first day of the year located in the current or previous year) to 364 or 371 (representing the last day of the year located in the current or later year).
day_of_year(date = today(), iso = FALSE, ..., width = NULL)logical default is TRUE which is not consistent with the rest of the package
as the not ISO day of the Year of January 1st can be different from 1
and possibly negative which can be confusing.
Further arguments for year_first
integer for fixed width result
integer ordinal