"List of Birthday deals/freebies"
http://www.ozbargain.com.au/wiki/list_of_birthday_deals
Subway give you a 6-inch + drink for free on your b'day. Just sign up online.
===> Do they(Subway)ask for the Birth-date proof?
(if we just put the random date)
Yes they do. Before your birthday you get sent a coupon with your name on it, and your submitted birthday (only for your preferred store). You need to bring ID to go with it that has your birthday on it too.