Homemade almond butter; what's its shelf life?

So I'm going thrifty this Christmas for non close friends and family, and making a variety of budget friendly gifts. It's going to include a lot of homemade items, and I was interested in making samples of homemade almond butter; I've seen tutorials that it is ridiculously easy to make and adjust to different flavors.

However, I'm not sure how far out in advance I can make them. Does anyone know what the shelf life is for one that is made and sealed off immediately afterwards? Do you think it will keep for the next month, or should I make it closer to December? The internet has not been too helpful for me so far, so I figured asking people who may have made it may yield better results.

Thank you!