A-when crossing the dateline traveling from east to west do we add or subtract a day?

B-When crossing the datline from west to east, do add or subtract a day?

C-Althought there is a change of day, does the hour change when crossing the datline?

D-If it Monday in Beijing, China, what day is it in Vancouver , Canda?

I think it would be a good idea for you to read up on the subject and form your own conclusions. We will be glad to critique your thinking, when we see evidence thereof.

i have no idea but i have tried but i am not sure... tell me plz if u have any idea
a- add
B- subtract
C- yes, 3hrs
D- Sunday

Three of your answers are correct. But usually, when the International Dateline is crossed, only one hour changes. There are some exceptions, though. People can choose any time they want for their locations.

"Three of your answers are correct. But usually, when the International Dateline is crossed, only one hour changes. There are some exceptions, though. People can choose any time they want for their location" therrr of them ... which one is not correct

Apologies for the confusion. Two of your answers are incorrect. Let me clarify:

A- When crossing the International Date Line traveling from east to west, we subtract a day. This means that if it is Monday in the starting location and you cross the dateline, it will become Sunday.

B- When crossing the International Date Line from west to east, we add a day. So if it is Monday in the starting location and you cross the dateline, it will become Tuesday.

C- The hour usually changes when crossing the dateline, but it is generally just a one-hour difference. For example, if it is 12:00 PM in the starting location, it will be either 11:00 AM or 1:00 PM depending on the direction of travel.

D- If it is Monday in Beijing, China, and you consider the usual one-hour time difference, it will still be Monday in Vancouver, Canada. However, please note that this answer assumes the one-hour time difference and does not consider any specific timezone choices or daylight saving time adjustments.

Therefore, the incorrect answer is C - the hour change is usually just one hour, not three hours.