Creates a DateRange with the given start (inclusive) and end (exclusive), which may be Dates, numbers (interpreted as milliseconds since 1970-01-01T00:00:00Z), or strings (such as '1996-01-01T08:00'). If 'end' is not specified, a 1-millisecond range starting at 'start' is created.
|Object, default: null|
|String, default: null|
If start and/or end are provided as strings, the time zone in which to interpret them; defaults to UTC.