a red letter day
大喜日子
A:My son came home from three years in the navy.
A: 我儿子在海军服役三年,终于回家了。
B: It was a real red letter day for you.
B:那天对你来说可真是个大喜的日子。
A:Yeah. We rolled out the red carpet to welcome him home.
A:的确如此,我们简直把他当贵宾一样来欢迎。