No matter our circumstances, no matter our challenges or trials, there is something in each day to embrace and cherish. There is something in each day that can bring gratitude and joy if only we will see and appreciate it.
Even if we're in a state of hopelessness, a sense of expectation is an integral part of our relationship to time. Hopelessness is possible only because we do hope that some good, loving someone could come. If that's what Heidegger meant, then I agree with him.