I want to send an email according to the Subscribers Time Zone

[joeyk]

Not an elegant way. You can segment them and send the email timed to the segment.

Here is a prev. discussion on this topic:

Feature: Send email at relative time of day (i.e. local time zone)

As a workaround until its implemented you could maybe set your Cronjobs to only run through “business hours”… But its really only a workaround. This would also mean, that people entering a form at night would need to receive some feedback through the form submit itself, not through a campaign which pauses by then.