Project with "non'specific" or "generic" year

I have a project that I wish to start without specifying the year. I’d like to have the year as “Year 1” then “Year 2” etc. MS-Project allows such a definition, but I do not see a way to do it in GanttProject.

Please find the project starting in Year 1 in the attachment.
ProjectYear1.gan (2.3 KB)