Auto polpulating calendar

Hello, in order for this to make more sense, as I have a hard time explaining what I want to do, here is a little context. I am a wedding photographer, and what I want to be able to do is have a template spreadsheet of a specific timeline revolving around one date: the wedding day. I want to be able to enter the wedding day date, and have my other events (dates) automatically change dates according to that one date. e.g.: 2 weeks after, 30 days before, 4 and half months before...etc, Without having to count out the days every time.

The template spreadsheet would include all these other events I want to add around the wedding day. They stay the same for every wedding.

Every wedding is the same (timeline wise), so to have this template automatically populate a monthly calendar with different titles for every couple, that would save so much time.

Am I making sense? Is this possible?

Thanks!

So, you want to record on one sheet something like "Jack & Jill" and the date of their proposed wedding, and then on a calendar sheet you would have 4 entries appear on the appropriate dates, i.e. "Jack & Jill, 4 and a half months to go", "Jack & Jill, 30 days to go", "Jack & Jill, Wedding Day" and "Jack & Jill, 2 weeks after"? You will need to define what you mean by "4 and a half months" in terms of days, but it should be fairly straightforward.

Pete