We have all been there. Whether it involves a birthday or a business meeting, everyone knows the feeling of scrambling to remember an important date. In the world of benefit plan notices, dates matter too. The small date imprinted in black ink on the corner of an envelope may dictate whether a tax return, important filing, or required notice is timely or late. If your organization mails anything related to employee benefits, this quiet but consequential rule change deserves your attention.