Timeline and Wall Dates showing N-0XX-2014

Nothing was done to the site, no updates or changes. All of a sudden all my dates on timelines are showing N-099-2014.

See attached image.

What about dates on the rest of the site?  Is it just isolated to the timeline?

It looks like you've changed date/time format:

Admin panel > settings > language settings > settings

Try to restore the following values to the default:

Short Date Format (For Code): d.m.Y
Short Date Format (For Database):%d.%m.%Y