Since I installed Observium a few weeks ago I have noticed that the overview timestamp for syslog and event log delta is wrong for most (not all) devices, this is prevalent on the main overview and the specific device overview page. By wrong I mean "-1y -1d -xh." etc..

Hovering over the incorrect entry pops up the correct timestamp so I think it's just the logic in calculating the delta between current time and that event that's broken, also viewing the syslogs and entry logs directly with the original timestamp is fine as well. I checked my local timezone and php timezone just to be sure and they are reporting correctly, I would imagine this would break the original timestamp anyway which is not the problem here.

Hover over example:

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I find it particularly weird as not every device is doing this, the ones that are have no real pattern either, mixture of N7K,N5K,ASA etc and some even have a mixture of working and broken entries (individual device overview):

Anyone else seen this, any ideas? 

Cheers.