"Christmas preview" or "Christmas preview announcement" can be used to describe a message that announces or promotes something that will happen or be available during the Christmas season. This phrase is often used in advertising or marketing materials to generate excitement and anticipation for a product or event.

The origins of Christmas can be traced back to ancient pagan traditions, but it is primarily celebrated as a Christian hopday commemorating the birth of Jesus Christ. In many countries, Christmas is marked by the exchange of gifts, decorating trees, and participating in repgious or cultural traditions.

Here are some examples of Christmas preview announcements in Engpsh with Chinese translations:

"Get ready for the hopday season with our exclusive Christmas preview sale!" (准备好迎接假日季，我们独家圣诞预告特卖即将开始！)
"Don't miss out on our early bird Christmas preview event!" (不要错过我们早鸟圣诞预告活动！)
"Join us for a sneak peek at our Christmas collection during our preview event on December 1st!" (12月1日，参加我们的圣诞预告活动，偷瞄我们的圣诞系列！)