Absolute search results in widget using wrong time

[edmundoa]

Problem description

From the mailing list:

Ive got a (little) dashboard problem, that drives me crazy. I want the histogram showing the message flow of a day.
I do a general search for all messages of a certain day using the time picker from 2016-06-15 00:00:00 to 2016-06-16 00:00:00.
My timezone is Europe/Berlin, so plus 2 hours at the moment. In the browser URL I can see "from=2016-06-14T22%3A00...."

The histogram shows 24 bars from 00 to 23, everything is fine until I add the histogram to a dashboard.
Now the histogram has that particular time range from 2016-05-14 22:00:00:00 to 2016-06-15 22:00:00:

What am I doing wrong, that this -2 hours shift happens?

I could reproduce the issue in the current master.

Steps to reproduce the problem

1. Set Europe/Berlin as your Graylog, browser, and user time zone
2. Do an absolute search (the range shouldn't really matter, but it's easier to see if you pick midnight). I tried with 2016-06-27 00:00:00 to 2016-06-28 00:00:00
3. Verify that the histogram x-axis shows the time range selected (from 00:00 to 00:00 in your time zone). Also see that the URL params are from=2016-06-26T22%3A00%3A00.000Z&to=2016-06-27T22%3A00%3A00.000Z
4. Add the search histogram to a dashboard
5. Verify that the search result histogram widget x-axis displays the wrong time
6. Open the widget information and see that it is using { "from": "2016-06-26T20:00:00.000+0000", "to": "2016-06-27T20:00:00.000+0000", "type": "absolute" } as time range

Environment

• Graylog Version: 2.0.3 / 2.1.0-SNAPSHOT (21c0bcf)
• Browser version: Chrome 53