Every month I submit a graph of month-wise product movement to directors.
Many events which are not directly related to data entity but are external happening which might have affect on sale ; are indicated by creating tag lable.
For example, promotional event, consumer awareness campain, pack design change etc. appropriate lable is pasted in the graph.
However everytime I have to re-create , paste these lables as new month data is added or if graph for earlier months/period is requested.
This excercise has to be carried out for each SKU/Brand ; it's a time consuming excercise .
Is there any easy way to tag these non-data related but important events ; store the co-relation and re-produce it as and when required?

Thanks,