Chinese phrase
截止时间是〜？ jié zhǐ shí jiān shì 〜
Meaning
Is the deadline at ___?
When to use it
Asks whether a deadline is at a stated time. It is a clear, neutral way to confirm when something must be completed.
Example dialogue
助教，截止时间是23:59？ zhù jiào jié zhǐ shí jiān shì 23 59
Is the deadline at 23:59?
对，是23:59，请按时提交。 duì shì 23 59 qǐng àn shí tí jiāo
Yes, it is 23:59. Please submit on time.