C :: How To Access Nested Structure Using Pointer

I need to know how to access the nested structure using pointer, i mean i know how to do that when i have simple structure, for example:

Code:
struct person{
char fname[16], lname[16];
int age;
}

for this example i can use

Code: (*pointer).age
or
Code: pointer->age

But if i have structure like this:

Code:
struct date{
int day, month, year;
}
struct person{
char fname[16], lname[16];
struct date birthDate;
}

Then how can i access the birthDate using pointer?