Can I start a promotion immediately after setting coupon on Amazon?

When you create a coupon on Amazon, the actual effective time of the coupon is 4 hours after the start date you set on Amazon. The promotion can only be started after the coupon takes effect. Otherwise, the buyer cannot use the code. It should be noted that the effective time of the coupon is generally PDT time, while VIPON is the EST time, pay attention to time zone conversion.