In any tag's info page, under the Stats section the created detail is displaying. But the period is displaying wrongly.

For an example the moderator-tools was created on 2011-07-31, so the duration period should be 5 years, 11 months. But in the Stats it is displaying as 7 years, 1 month.

I have verified for most of the tags and the period is displaying wrongly in the Stats page.