在英语中，"It's time to go to the party." 意思是 "该去参加派对了"。
这个表达方式来源于英语中经常使用的时间短语 "It's time"，意思是 "是时候"。例如：
It's time for lunch. (是午餐时间了)
It's time to go to bed. (是睡觉的时间了)
结合上下文使用，"It's time to go to the party." 就可以表示 "该去参加派对了"。
其他表达方式还有：
We should go to the party now. (我们现在应该去派对了)
The party is about to start, let's go. (派对快要开始了，我们走吧)
例句：
John: "What time is it?"
Mary: "It's 8:30. It's time to go to the party." (约翰："几点了？" 玛丽："8:30。该去参加派对了。")
"I'm really looking forward to the party tonight. It's time to get dressed and head out." (今晚的派对我真的很期待。该穿衣服出发了。)