Shouldn't dst() on a date return NA?

[etiennebacher]

Hello, the docs of dst() say:

[returns] TRUE if DST is in force, FALSE if not, NA if unknown.

and

A date-time's daylight savings flag can not be set because it depends on the date-time's year, month, day, and hour values.

But the example in the docs shows what happens when the input is a date:

x <- ymd("2012-03-26")
dst(x)
#> [1] FALSE

To me the example contradicts the explanation. If a flag "cannot be set", shouldn't the output be NA?

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Additionally, I think the examples could be improved to show an example of a datetime with TZ that returns FALSE and one that returns TRUE.