The time point to check whether this interval is before it.
assert(!NegInfInterval!Date(Date(2012, 3, 1)).isBefore(Date(1994, 12, 24))); assert(!NegInfInterval!Date(Date(2012, 3, 1)).isBefore(Date(2000, 1, 5))); assert(NegInfInterval!Date(Date(2012, 3, 1)).isBefore(Date(2012, 3, 1)));
Whether this interval is before the given time point.