Mine's 3 days(Friday to Sunday). Had some short naps though. We needed to fix a production issue which was not even caused by our team.:D We had to deploy a new version of our application(a replacement of the one which caused the issue) to resolve it. News reached us that we need to stay reached us on Friday late afternoon, around 5pm and we were able to go back home on Sunday afternoon. I was 15 younger then so I was able to cope. I even went to work the following Monday.
How about you, what's your longest stretch?