3.2.1. Task must be done by a particular date (but perhaps could be done sooner) [1,3]

EXAMPLE 1

File income taxes by April 15.

EXAMPLE 2

Deliver project scope to customer by March 1.

EXAMPLE 3

Give dog heartworm medicine on the 9th of the month.

EXAMPLE 4

Certificate for web server expires on the October 20, get new one to install by that date.