Pardon me for bumping in. As Larry mentions you can use a custom field (Text1) to calculate the difference between the project start date and the start of each task. Then use another field (Text2) to calculate the difference between each tasks finish date and the project start date. Then modify the bar styles to show those ‘generic’ dates next to each bar.
For example: Add the Text1 field to a table and customize the field with the following formula:
“D ” & ProjDateDiff([Project Start],[Start], “name of the project calendar”)/[Minutes Per Day]
replace the text name of the project calendar with the name of your project calendar.
Repeat the process for the Text2 field using the formula:
“D ” & ProjDateDiff([Project Start],[Finish], “name of the project calendar”)/[Minutes Per Day]
Then modify the Bar styles to show Text1 to the left of the bar and Text2 to the right of the bar.
You can then hide the Text1 and Text2 fields in the table.