Fauna has two special data types dealing with dates and times. The first
data type is date which stores a calendar date. The second is a
timestamp (ts) which stores an instant in time expressed as a calendar
date and time of day. Timestamp can safely store nanoseconds precision,
but be careful as many operating system clocks provide only microsecond
precision. All Timestamps are stored in UTC. If a timestamp is inserted
with a timezone (TZ), it is converted to UTC and the local timezone is
not stored. The following functions allow the manipulation of dates and
timestamps.