Notice of changes to the site?

Question

JavaScript

Hello everyone, perhaps the question is very easy, but I don’t even know where to catch on when searching.
The situation is this:
There is a site where you can register for the exam, where there is a list of cities with the earliest possible days for the exam.
It looks something like this:
02/10/2017 12:00 City1
02/17/2017 13:10 City2 02/25/2017 15:30
City3
, for example, "City3" might move to another location with an earlier date.
How can I make some kind of notification when the value of a certain city changes?
Since the site is closed, no ordinary notifiers will help. It is necessary to check from my open page.
For example, in the source code of the site, the line "25.02.2017 15:30 City3" looks like this:

<a id="******" href="#" class="*******" onclick="*********">
  <strong>22.02.2017</strong>
  14:30
  <strong>Город3 »</strong></a>

Is it possible to somehow take the value from the code with "City3" and make a notification when the date / time changes?
And it is necessary that the site is somehow updated, because the values ​​\u200b\u200bwithout this do not change.

Answer 1

Found a great solution with the chrome app Distill Web Monitor. It ideally monitors changes in a certain block on the site and updates it itself.