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A save the date notice is an item stating the date of a wedding or other formal event. It typically states the date when a couple plans to marry, so that recipients will know to keep that date free. Save the dates usually take the form of a card, but can also be a refrigerator magnet or similar item. They are generally sent out at least six to twelve months before the wedding date, and are usually followed by a formal wedding invitation.
Save the date，通常是歐美國家的習慣。
由於西方國家地方廣大，沒有辦法有像台灣這樣的一日生活圈，因此新人們通常會提早將喜訊通知給親朋好友，好讓親友們可以提前安排假期、旅程與機票等等。