first
under my calendars on the left hand side
make sure there's a check mark next to
your birthdays calendar
now go to contacts.google.com and select
contacts from the left hand side click
create a contact and then create a
contact again from the drop-down
a pop-up window will appear type the
name of the person whose birthday it is
and other details if you wish click show
more
and scroll down to find birthday
add their date of birth and then click
save
back in google calendar refresh your web
page
and you'll see the birthday appear in
your calendar
you