2012 to me was incredibly early.
We then had a major snow at the end of April 2010 with green leaves out… I had 12” at 300ft where I lived in Richmond, VT next to the Winooski River. 1,000ft+ had 18-24”, 3,000ft had 30”.
The early leaf out then snow and cold messed up the vegetation. I don’t know if I remember 2010 being noteworthy early. I’ll have to look back into photos.