I have a large spreadsheet where I need to keep track of coming expiration dates and I would like dates which are within 30 days from today's date OR which have already passed to be highlighted in red. However, all of the stuff I have found online so far results in the entire column getting highlighted or not no matter what I do.

What would the formula be for it to highlight both dates which have passed already AND dates within the next 30 days?

I have a large spreadsheet where I need to keep track of coming expiration dates and I would like dates which are within 30 days from today's date OR which have already passed to be highlighted in red.

However, all of the stuff I have found online so far results in the entire column getting highlighted or not no matter what I do.

What would the formula be for it to highlight both dates which have passed already AND dates within the next 30 days?