Trending @Accenture; Notice Period Buyout

Can someone please tell me, immediately after the notice period end date I should be joining the new company immediately next day or a gap of 1 week is okay?

For e.g if I ask HR after negotiating to reduce notice period my last working day will be 10 th may and my doj at new organisation is 20 may so the gap of 10 days is okay? Or I should immediately join a new org day after my last working day i.e on 11th May I should be joining a new org.

I am asking this as we have to upload LWD in the portal so the gap is fine or not?