How many times have you received similar email or message from someone, who asked when a certain task need to be completed?
When is the dateline that the response need to be submitted?
Dateline? Seriously? There is only 1 dateline in the world, which is the imaginary line that runs from North Pole to South Pole, crossing the equator at 180 degree longitude. The line demarcates the change of one calendar day to the next. The timezone at the Dateline is often referred as UTC+0, or GMT+0.
Another definition of Dateline is the line in newspaper, where the date and place of writing is mentioned. So, unless the answer expected is to refer a date of when an article was written, the question is definitely out of context.
The word deadline in the question above should be used instead of dateline. Deadline literally means that if you cross the line, you are dead. Some say that Deadline is a line in a war zone in which, beyond the line, you should be safe from being fired. If you cross the line, the enemy can fire at you. other source said that it is a line in a prison, several meters from the wall. If a prisoner cross the line, the guards can open fire toward him.
In today’s term, I think the word deadline still has the same meaning. If you cross the line, which usually a date and time, means you are dead. If you submit your work after the deadline, your test, homework, proposal, or whatever it might be, will not be scored or processed.
So, next time you write an email or send a text message, make sure you use deadline, not dateline, unless you are referring to the International Date Line