Yellow Jessamine blooming in December?

In 2008 they bloomed in March, Two blooms in 2011 they bloomed in late February, in 2012 they bloomed in late January and early February, in 2013, they bloomed in the middle of January, and in 2015, some are blooming in late December. A couple of days ago, the sweet odor of Jessamine at the gate was overwhelming on Christmas Day. Does this seem right to you?