[1.7.x] Added dates to release notes.
[1.7.x] Added dates to release notes.

Backport of 06aaed41a4a9b8da8aca5854a45e457c0b72210e from master

jyotsna1820/django,jyotsna1820/django,oscaro/django,jyotsna1820/django,oscaro/django,jyotsna1820/django,oscaro/django,oscaro/django