Dating direct month
That means that the play was without fail written after (in Latin, post) 1587.
Many disciplines of archaeological science are concerned with dating evidence, but in practice several different dating techniques must be applied in some circumstances, thus dating evidence for much of an archaeological sequence recorded during excavation requires matching information from known absolute or some associated steps, with a careful study of stratigraphic relationships.
Rather, a recession is a significant decline in economic activity spread across the economy, lasting more than a few months, normally visible in real GDP, real income, employment, industrial production, and wholesale-retail sales.
For more information, see the latest announcement from the NBER's Business Cycle Dating Committee, dated 9/20/10.
The stratigraphy of an archaeological site can be used to date, or refine the date, of particular activities ("contexts") on that site.
For example, if a context is sealed between two other contexts of known date, it can be inferred that the middle context must date to between those dates.