rain date
noun/ˈreɪn deɪt/
/ˈreɪn deɪt/
(North American English)- an alternative date when an event will take place if it has to be cancelled on the original date because of rain
遇雨改期日 - July 15 is our annual fun day (rain date July 22).
7 月 15 日是我们一年一度的游乐日（遇雨则改至 7 月 22 日）。 - He will announce a rain date by Monday.
他将在周一之前宣布降雨日期。
- July 15 is our annual fun day (rain date July 22).