What is "month of consecution"

Consecution \Con`se*cu"tion\, n. [L. consecutio. See Consequent.]

1. A following, or sequel; actual or logical dependence.
   --Sir M. Hale.

2. A succession or series of any kind. [Obs.]
   --Sir I. Newton.

   Month of consecution (Astron.), a month as reckoned from one conjunction of the moon with the sun to another.