hadley/lubridate — Issue #112: Adding `months` periods to end of month instant badness
Author: mannyishere
Created: 2012-02-23 23:52:54+00:00
State: open

Suppose you have the end of a month instant:
```date3 <- ymd("2012-07-31")```

Now suppose that you would like to find the instant one (period) month