This is the 8342nd most frequent Japanese word.
後日
"Later date" or "in the future."
Here, 後日 is used to denote a future date in a general or undefined sense, indicating that the details will be shared later.
後日、詳細をご連絡いたします。
We will provide the details at a later date.
In this usage, 後日 serves to postpone discussing the meeting's details to an upcoming unspecified time.
その会議の内容は後日ゆっくり話します。
We will discuss the contents of the meeting at a later date in more detail.
The term 後日 is used to highlight that there will be further evaluation of the matter in a future time frame.