Sometimes you may forget what the date is on a certain day.

有时候，在一些特定的日子里，你可能会忘记那天是几月几号？

youdao

On a certain day at a certain hour, we will pull into the station. Bands will be playing and flags waving.

在某一天的某一时刻，我们的火车将会到站，迎接我们的将是演奏的乐队和飘舞的旗帜。

youdao

On a certain day at a certain hour we will pull into the station. There sill be bands playing, and flags waving.

某天的某一刻，我们抵达站点，会有乐队演奏，欢迎旗帜飘扬。

youdao

Such performance-based exams have a big advantage over multiple choice: They go beyond whether students can regurgitate a set of facts on a certain day to assess their know-how.

FORBES: Instant feedback in the classroom

All of these facts together may make it seem more likely that kids are getting a fever on a certain day of the week even though it may just be a coincidence.

CNN: Why do kids always get fevers on Sunday nights?

The Administration and Congress should carry Powell's idea to its all-too-logical and necessary conclusion: On a date certain--call it Liberation Day--a year or so from now, all barriers to entry into any facet of communications would be eliminated.

FORBES: Fact and Comment