Automatically amend dataset date by 6 weeks

Hi, thanks for looking at my question - I’m trying to find a way of changing a dataset date on my dynamic page to 6 weeks previous.

For example, if a product is released on Friday 3rd November which is in a column in the dataset, I also need to let customers know that assets will be available to download on Friday 22nd September. Is there a way I can automate this in Velo on the page, rather than a separate column in the dataset that I have to calculate by hand?

I’m using Editor X and Velo but not very experienced in writing my own js code. Yet!

Thanks very much for any help you can give.