[racket] Question: struct lax-date

Hi,

I was just trying out the date conversion in srfi/19, namely the
string->date function.
I noticed that this function will return a lax-date struct when the year is
not specified.

If I do the following, this works:

#lang racket
(require srfi/19)
(lax-date? (string->date "Feb 11 11:20" "~b ~d ~H:~M"))

However, this one does not work:

#lang racket
(require srfi/19)
(lax-date-day (string->date "Feb 11 11:20" "~b ~d ~H:~M"))

results in:

lax-date-day: unbound identifier in module in: lax-date-day

Is there a simple way to access the struct members of lax-date ?

Thank you very much,

Wei-ju
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