Examples
tā men他们de的hé tong合同zài在zhè这gè个yuè dǐ月底dào qī到期。
他们的合同在这个月底到期。
Their contract is to run out at the end of this month.
你必须在到期前完成这项工作。
You must get the job done before the deadline.
让我再次提醒你3月31日是到期日。
Let me remind you again that March 31st is the due date.