Automatic adjustment date

[zbiku25]

Hi,



I have problem with my MS Project 2010. In my project I have 2 positions:

1. First Meeting
...
...
...
2. The day of party

I know that the day of party is 1.09.2017 - this date I will write manually. I want the date of "The day of party" to set automatically as 24 month before the date of "First Meeting".

Anybody knows what should I do?

Regards,
Piotr