Valentine's Day and Halloween and Thanksgiving are very much American things.
What has happened in recent years (decades) is that our "traditional" Christmas meal is pretty close to what Americans call a thanksgiving meal. When I was a kid we would have cold ham or roast pork at Christmas time. Nowadays people tend to either have turkey or seafood. A few weeks out from Christmas the supermarket freezers are filling up with turkeys of various sizes, and then maybe a week or so out from Christmas the fresh (not frozen) turkeys start filling up the chilled section.
Instead of pie for dessert we usually have pavlova. Usually with tropical fruits like mango and passionfruit and pineapple. Because it's summer here. I make the whole thing myself but I think most people these days just buy a pavlova shell from the supermarket. Last time I made apple pie was when I was staying in the US.
Our suburb is famous for Christmas lights. People come from other parts of the city to either park their cars and walk around, or drive around really slowly with their windows down and taking videos with their phones. Remember that it's midsummer here, so it doesn't really start getting dark until around 8:30 pm and then people turn the lights off when they go to sleep maybe a couple of hours after dark. Here's an example from my area:
We put up lights on our trees and the front of our house, nothing like this though.
