(Builds on: Data structure basics)
(Leads to: Parsing details, Time spans)
Date/time data includes dates, date-times, and times, but we’ll mostly
focus on dates and date-times. This unit gives you the basic tools you’ll
need to filter and summarize temporal data.
Creating date/times [r4ds-16.2]
Date-time components [r4ds-16.3].
Read only §16.3.1 (getting components) and §16.3.2 (rounding). These are
both important for when you want to group by and summarise longer time