Year and month

Sergey Zubarev <info@js-labs.org>

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2015 0 0 0 0 0 0 0 0 0 0 0 1
2016 1 1 0 0 0 2 0 0 0 0 0 0
2017 0 0 2 0 0 0 0 0 0 0 0 0