For some reason, the devs seem reluctant to include dates in the changes file. However if you really need them, they can be gotten.

If you have a git installation (with related linuxish tools like sed and grep, such as under WSL), and a cloned copy of the NVDA repository, you can do the following. You can change the date format in various ways, if this is not to your liking--E.G. changing "local" to "short", to get 2019-01-01 format dates:

git for-each-ref --sort=taggerdate --format "- %(tag) (%(taggerdate:local))" refs/tags|grep -vE "(rc|beta)"|grep release|tac|sed 's/release-//g'

That is slightly modified from the example in this discussion, to which you might want to add your comment about the use case for dates:
https://github.com/nvaccess/nvda/issues/10013

The above command, on an old copy of the repo that I have laying around, gives the following results:

- 2019.1.1 (Tue Apr 9 21:43:33 2019)
- 2019.1 (Mon Mar 25 16:06:20 2019)
- 2018.4.1 (Sun Jan 13 19:29:29 2019)
- 2018.4 (Sun Dec 16 16:44:00 2018)
- 2018.3.2 (Wed Sep 26 02:45:15 2018)
- 2018.3.1 (Wed Sep 19 19:08:13 2018)
- 2018.3 (Tue Sep 18 00:06:47 2018)
- 2018.2.1 (Sat Jul 7 08:27:36 2018)
- 2018.2 (Wed Jun 13 01:32:22 2018)
- 2018.1.1 (Tue Mar 27 22:30:58 2018)
- 2018.1 (Wed Mar 7 23:39:53 2018)
- 2017.4 (Tue Dec 5 21:34:41 2017)
- 2017.3 (Thu Aug 24 06:45:05 2017)
- 2017.2 (Mon May 29 02:20:51 2017)
- 2017.1 (Tue Feb 21 23:47:11 2017)
- 2016.4 (Thu Dec 15 18:28:38 2016)
- 2016.3 (Tue Sep 6 00:59:00 2016)
- 2016.2.1 (Fri Jun 10 02:09:57 2016)
- 2016.2 (Thu Jun 2 00:50:10 2016)
- 2016.1 (Sun Feb 21 19:50:59 2016)
- 2015.4 (Sun Nov 22 19:32:53 2015)
- 2015.3 (Mon Aug 24 18:46:43 2015)
- 2015.2 (Mon Jun 15 13:33:16 2015)
- 2015.1 (Sun Feb 22 20:29:41 2015)
- 2014.4 (Thu Nov 27 00:11:47 2014)
- 2014.3 (Wed Sep 3 23:28:28 2014)
- 2014.2 (Thu May 22 08:22:52 2014)
- 2014.1 (Wed Mar 12 19:39:23 2014)
- 2013.3 (Tue Dec 3 20:17:57 2013)
- 2013.2 (Thu Aug 29 01:35:00 2013)
- 2013.1.1 (Sun Jun 23 23:33:53 2013)
- 2013.1 (Fri May 17 14:03:02 2013)

Regards,

Luke