An abstract date, with no associated time zone.
Use this type when you just want to represent a day, month and year in the Gregorian Calendar, and the timezone is either not relevant or represented elsewhere.
Date type includes a time of day and timezone offset.
These are a common source of errors in code that manipulates calendar dates,
in particular off-by-one errors caused by date manipulations that cross
npm install --save @softwareventures/date
yarn add @softwareventures/date