This version is presented of aweek is presented as a more mature and stable version of aweek:

combining objects is more predictable
weeks/dates can be created from vectors with heterogeneous week_starts
documentation is improved
data frames can be created
NEW FUNCTIONS
change_week_start() allows the user to change the week_start attribute of an aweek object, adjusting the weeks to match the new attribute accordingly.
get_aweek() can generate aweek objects from a vector of week numbers. It has the ability to take into account different week start times.
get_date() is similar to get_aweek(), but returns dates instead.
as.aweek() allows users to create aweek object directly from characters with validation. It also allows for dates by passing to date2week().
as.data.frame.aweek() is a new function that allows aweek objects to be directly incorporated into data frames.
as.list.aweek() will now preserve the aweek structure in lists
trunc.aweek() will truncate the day to the first day of the week.
rep.aweek() allows repeating aweek characters.
factor_aweek() allows the user to create aggregated aweek objects on the fly.
BREAKING CHANGES
There are a couple of breaking changes coming to aweek that will improve stability by removing unclear coercion methods (see https://github.com/reconhub/aweek/issues/20).

It is no longer possible to combine aweek objects if they do not share the same week_start attribute. This will result in an error informing the user to adjust the week_start attribute with the change_week_start() function.
Factors will no longer coerce factors when combining aweek objects.
Using date2week() with factor = TRUE and floor_day = FALSE now throws an error instead of a warning (as prophesized in #13).
DOCUMENTATION
The vignette has been updated to include an explanation of the underlying week calculation from date.
The aweek class documentation has been updated to detail the different elements of the object and the calculations.
Package documentation package?aweek has been added for an introduction.
BUG FIX
conversions will now retain the names of the object.
MISC
More checks that weekdays and weeks are within the correct bounds have been added.
as.Date.aweek has been simplified to no longer rely on regex since the aweek class is standard.
The internal get_wday() has been vastly simplified with improved speed.