Can you have a glass of wine while you are pregnant?

I was just curious about this topic on if it is okay to have half a glass of wine once in a blue moon while you are pregnant. I have heard mixed things about it and the only reason I am asking is because our one year anniversary is coming up next month and we are taking a trip to Australia to celebrate. I would love to be able to half a glass on our anniversary but I would only do so if it is actually okay. I rarely drank before I was pregnant and I haven’t drank since I have been for obvious reasons. I was just wondering what the general consensus was. Inputs are great!

Thanks for taking the time to answer this.