Even better if you can, right-click on the timestamp, select Inspect (Chrome, not sure what on other browsers), and include the value of the data-time attribute (1541195646 below).
<span class="_timestamp js-short-timestamp " data-aria-label-part="last" data-time="1541195646" data-time-ms="1541195646000" data-long-form="true">Nov 2</span>
This value is a number of seconds since 1 January 1970 00:00:00 (called Unix time) and is useful to clear up any timezone confusion.