@Kanika, I think now you can not change the zone! Because as far as I know only examination city can be changed & not the zone.
As they never ever mentioned anywhere about changing the zone.
The only way to know if this is possible or not is to contact the officials in IIT Kanpur
You can make a call to IIT kanpur or email them, they have given contact info in their website.
But Hurry up; the last date of accepting change in city is 30th Dec.
Hope you will get your desired city of examination.
@Kanika, I think now you can not change the zone! Because as far as I know only examination city can be changed & not the zone.
As they never ever mentioned anywhere about changing the zone.
The only way to know if this is possible or not is to contact the officials in IIT Kanpur
You can make a call to IIT kanpur or email them, they have given contact info in their website.
But Hurry up; the last date of accepting change in city is 30th Dec.
Hope you will get your desired city of examination.