Was only a week long sale, started on the 2nd. Ends tomorrow.
Technically it should be up until about 1 pm Tues. EST. If that makes a difference.
Gearbox's site says it ends on the 8th. Which is Monday.
It doesn't matter what that site says. It's the Deal of the Week. Every Deal of the Week basically ever goes into Tuesday afternoon EST until the new DotW goes live, even though they technically end Monday. --- Run you pigeons, it's Robert Frost!