我们当天就去了博物馆。
wǒmen dàngtiān jiù qùle bówù guǎn 。
We went to the museum that day.
当天的会议非常重要。
dàngtiān de huìyì fēicháng zhòngyào 。
The meeting on that day was very important.
请在当天完成这项工作。
qǐngzài dàngtiān wánchéng zhèxiàng gōngzuò 。
Please complete this task on that day.