It was called D-Day, a military term for an unspecified target date.

VOA: standard.2009.06.02

If it was a twenty-year bond, there would be forty coupons, one for each six-month period, and each one would have a date on it.

假如是20年债券,会有40张息票,每六个月一张,并且上面会有日期

耶鲁公开课 - 金融市场课程节选

This has made it very clear that there has to be -if you announce anything you have to announce it all at once on a certain date and you can't have favored people that you give the announcement to.

很明显的一点...,如果要宣布事项,就要选定某一天,而且,你宣布的消息,不能只针对某一人群

耶鲁公开课 - 金融市场课程节选