If you don't secure adequate funding before opening your doors, you'll not only struggle to endure hard times, you'll also fail to take advantage of short windows of opportunity. (entrepreneur.com)
They're looking for something distinct: information, inspiration, or an experience; and unfortunately, you have a very short window of time to deliver these needs. (inc.com)
My understanding is that defamation has a very short window for a lawsuit, like one year. (law.stackexchange.com)