The time zone determines the official "working day" for your ring@ campaign. ring@ Clients choice one permanent time zone for their campaign. All ad schedules, billing, and statistics for the campaign are set for that time zone. The time zone setting affects only the administration of the campaign -- it does not affect the locations or time zones where ads may show.

stop campaign at anytime for anytime, you will not cost for day your ads not appear. You can restart your campaign again when you decide to back or charge back your remaining money.