Is it necessary to have actual dates?

Hi Gregory

Thank you for your question. It is possible to replace dates with week numbers in the timescale.

From the Format menu choose Timescale. Make sure you are on the tab called "Middle Tier" on the dialogue box that appears.

Click the drop down beside Label and choose a more suitable alternative to the default date values.

I hope this helps - do let us know if you have any further questions.

Kind regards,
Andrew