Comment 5 for bug 1838327

Verified with 2.27-3ubuntu1.3 on Bionic:

ubuntu@ip-172-31-33-219:~$ dpkg -l libc6 libc6-lse | cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===============-===============-============-=================================
ii libc6:arm64 2.27-3ubuntu1.3 arm64 GNU C Library: Shared libraries
ii libc6-lse:arm64 2.27-3ubuntu1.3 arm64 GNU C Library: Shared Libraries
ubuntu@ip-172-31-33-219:~$ sudo dpkg-reconfigure ^C
ubuntu@ip-172-31-33-219:~$ LC_ALL=ja_JP.utf8 date +%EY -d 20190430
2019
ubuntu@ip-172-31-33-219:~$ sudo dpkg-reconfigure locales
Generating locales (this might take a while)...
  en_US.UTF-8... done
  ja_JP.UTF-8... done
Generation complete.
ubuntu@ip-172-31-33-219:~$ LC_ALL=ja_JP.utf8 date +%EY -d 20190430
平成31年
ubuntu@ip-172-31-33-219:~$ LC_ALL=ja_JP.utf8 date +%EY -d 20190501
令和元年
ubuntu@ip-172-31-33-219:~$ dpkg -l locales
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=====================================-=======================-=======================-================================================================================
ii locales 2.27-3ubuntu1.3 all GNU C Library: National Language (locale) data [support]