adj.可测定日期的，可确定年代的

I'm sorry, but I won't be able to make it to the meeting tomorrow due to a prior appointment.
我对不起，但是我明天无法参加会议，因为我有其他预约。
The restaurant requires all customers to make a reservation in advance.
餐馆要求所有顾客提前预定。
Please fill out this form and return it by the due date.
请填写这份表格，并在截止日期前返回。
She's always on time for her classes, showing great dedication to her studies.
她总是准时上课，对学习非常投入。
He missed the deadline for submitting his project, resulting in a lower grade.
他错过了提交项目的时间截止日，因此成绩较低。
We need to update our database with new employee information regularly.
我们需要定期更新数据库中的新员工信息。
The report is due next Friday, so we need to start working on it immediately.
报告下周五到期，所以我们需要立即开始工作。
The company policy states that all travel expenses must be claimed within 30 days of the trip.
公司政策规定，所有旅行费用必须在旅行后30天内报销。
The library asks patrons to return books on time to ensure everyone has access to them.
图书馆要求读者按时归还书籍，以确保每个人都能使用它们。
The software update will be available for download on the 15th of every month.
软件更新将在每个月的15号提供下载。