When shall we go on a picnic, Saturday or Sunday?

我们什么时候去野餐，周六还是周日？

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When Boxing Day falls on a Saturday or Sunday, the following Monday is the public holiday.

"当节礼日是星期六或星期日时，紧跟着的星期一就是公众假期。

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He is coming either on Saturday or on Sunday.

他不是星期六来，就是星期天来。

《新英汉大辞典》

The report shows that more people work on weekdays than on Saturday and Sunday - the traditional weekend days.

VOA: special.2011.07.22

On Saturday the finance ministers discuss IMF global operations and on Sunday they set a policy agenda for the anti-poverty programs of the World Bank.

VOA: standard.2009.04.24

Tempers flared on Saturday and Sunday - both inside and outside of the Capitol - as lawmakers prepared to vote on the contentious health care reform legislation.

VOA: standard.2010.03.25

The council said the street could be reopened late on Saturday or on Sunday after works are complete.

BBC: Reading Friar Street cracked road surface

Mr. Kerry will visit South Korea on Friday, China on Saturday and Japan on Sunday.

WSJ: U.S. Says North Korea May Have Nuclear Missile

The top American diplomat visits China on Saturday and Japan on Sunday.

WSJ: U.S., South Korea Offer North Talks, and a Warning