在宋對遼的交聘活動中，每一環節日程的安排，可謂是一件很重要的事情，如果沒有妥當的安排，將會影響交聘活動的順利進行。因此筆者以〈宋派任使遼正旦使副日期考〉為題，將宋朝廷派任使遼正旦使副的日期，根據其演變的差異情形，分為三個階段，列表加以探討，並且討論當時宋朝廷改派使節的原因，以及對派定日期延後的影響。

The schedule of each link of activities between the Song Dynasty and Liao Dynasty are very important, as lack of proper arrangement affects the smooth progress of engagement activities. Thus, in “A Study on the Service Date as Envoys to Liao Zhengdan and Deputies Appointed by the Song Dynasty”, I discuss differences between the changes, the dates of the Song royal court's appointment of envoys to Liao Zhengdan and deputies (divided into three stages), and the reasons for the change of the Song royal court's envoys at that time and their influence on the postponement of appointment dates.