Log Message:
(time/R-lubridate) Updated 1.7.10 to 1.9.2

Version 1.9.2
=============

### BUG FIXES

* [#1104](https://github.com/tidyverse/lubridate/issues/1104) Fix
  incorrect parsing of months when %a format is present.

### OTHER

* Adapt to internal name changes in R-devel

Version 1.9.1
=============

### NEW FEATURES

* `as_datetime()` accepts multiple formats in format argument, just like \ 
`as_date()` does.

### BUG FIXES

* [#1091](https://github.com/tidyverse/lubridate/issues/1091) Fix
  formatting of numeric inputs to parse_date_time.

* [#1092](https://github.com/tidyverse/lubridate/issues/1092) Fix
  regression in `ymd_hm` on locales where `p` format is not defined.

* [#1097](https://github.com/tidyverse/lubridate/issues/1097) Fix
  `as_date("character")` to work correctly with formats that include
  extra characters.

* [#1098](https://github.com/tidyverse/lubridate/issues/1098) Roll
  over the month boundary in `make_dateime()` when units exceed their
  maximal values.

* [#1090](https://github.com/tidyverse/lubridate/issues/1090)
  timechange has been moved from Depends to Imports.

Version 1.9.0
=============

### NEW FEATURES

* `roll` argument to updating and time-zone manipulation functions is
  deprecated in favor of a new `roll_dst` parameter.

* [#1042](https://github.com/tidyverse/lubridate/issues/1042)
  `as_date` with character inputs accepts multiple formats in `format`
  argument. When `format` is supplied, the input string is parsed with
  `parse_date_time` instead of the old `strptime`.

* [#1055](https://github.com/tidyverse/lubridate/issues/1055)
  Implement `as.integer` method for Duration, Period and Interval
  classes.

* [#1061](https://github.com/tidyverse/lubridate/issues/1061) Make
  `year<-`, `month<-` etc. accessors truly generic. In order to make
  them work with arbitrary class XYZ, it's enough to define a
  `reclass_date.XYZ` method.

* [#1061](https://github.com/tidyverse/lubridate/issues/1061) Add
  support for `year<-`, `month<-` etc. accessors for `data.table`'s
  IDate and ITime objects.

* [#1017](https://github.com/tidyverse/lubridate/issues/1017)
  `week_start` argument in all lubridate functions now accepts full
  and abbreviated names of the days of the week.

* The assignment value `wday<-` can be a string either in English or
  as provided by the current locale.

* Date rounding functions accept a date-time `unit` argument for
  rounding to a vector of date-times.

* [#1005](https://github.com/tidyverse/lubridate/issues/1005)
  `as.duration` now allows for full roundtrip `duration ->
  as.character -> as.duration`

* [#911](https://github.com/tidyverse/lubridate/issues/911) C parsers
  treat multiple spaces as one (just like strptime does)

* `stamp` gained new argument `exact=FALSE` to indicate whether
  `orders` argument is an exact strptime formats string or not.

* [#1001](https://github.com/tidyverse/lubridate/issues/1001) Add
  `%within` method with signature (Interval, list), which was
  documented but not implemented.

* [#941](https://github.com/tidyverse/lubridate/issues/941)
  `format_ISO8601()` gained a new option `usetz="Z"` to format time
  zones with a "Z" and convert the time to the UTC time zone.

* [#931](https://github.com/tidyverse/lubridate/issues/931) Usage of
  `Period` objects in rounding functions is explicitly documented.

### BUG FIXES

* [#1036](https://github.com/tidyverse/lubridate/issues/1036)
  `%within%` now correctly works with flipped intervals

* [#1085](https://github.com/tidyverse/lubridate/issues/1085)
  `as_datetime()` now preserves the time zone of the POSIXt input.

* [#1072](https://github.com/tidyverse/lubridate/issues/1072) Names
  are now handled correctly when combining multiple Period or Interval
  objects.

* [#1003](https://github.com/tidyverse/lubridate/issues/1003)
  Correctly handle r and R formats in locales which have no p format

* [#1074](https://github.com/tidyverse/lubridate/issues/1074) Fix
  concatination of named Period, Interval and Duration vectors.

* [#1044](https://github.com/tidyverse/lubridate/issues/1044) POSIXlt
  results returned by `fast_strptime()` and `parse_date_time2()` now
  have a recycled `isdst` field.

* [#1069](https://github.com/tidyverse/lubridate/issues/1069) Internal
  code handling the addition of period months and years no longer
  generates partially recycled POSIXlt objects.

* Fix rounding of POSIXlt objects

* [#1007](https://github.com/tidyverse/lubridate/issues/1007) Internal
  lubridate formats are no longer propagated to stamp formater.

* `train` argument in `parse_date_time` now takes effect. It was
  previously ignored.

* [#1004](https://github.com/tidyverse/lubridate/issues/1004) Fix
  `c.POSIXct` and `c.Date` on empty single POSIXct and Date vectors.

* [#1013](https://github.com/tidyverse/lubridate/issues/1013) Fix
  c(`POSIXct`,`POSIXlt`) heterogeneous concatenation.

* [#1002](https://github.com/tidyverse/lubridate/issues/1002) Parsing
  only with format `j` now works on numeric inputs.

* `stamp()` now correctly errors when no formats could be guessed.

* Updating a date with timezone (e.g. `tzs = "UTC"`) now returns a POSIXct.

### INTERNALS

* `lubridate` is now relying on `timechange` package for update and
  time-zone computation. Google's CCTZ code is no longer part of the
  package.

* `lubridate`'s updating logic is now built on top of `timechange`
  package.

* Change implementation of `c.Period`, `c.Duration` and `c.Interval`
  from S4 to S3.

Version 1.8.0
=============

### NEW FEATURES

* [#960](https://github.com/tidyverse/lubridate/issues/960)
  `c.POSIXct` and `c.Date` can deal with heterogeneous object types
  (e.g `c(date, datetime)` works as expected)

### BUG FIXES

* [#994](https://github.com/tidyverse/lubridate/issues/994)
  Subtracting two duration or two period objects no longer results in
  an ambiguous dispatch note.

* `c.Date` and `c.POSIXct` correctly deal with empty vectors.

* `as_datetime(date, tz=XYZ)` returns the date-time object with HMS
  set to 00:00:00 in the corresponding `tz`

### CHANGES

* [#966](https://github.com/tidyverse/lubridate/pull/966) Lubridate is
  now built with cpp11 (contribution of @DavisVaughan)