All dates and times in AdPlugg currently use the UTC (Coordinated Universal Time) time zone. This is the standard time zone for world clocks and is linked to GMT (the time zone for England). We already have it on our internal development list but this post can serve as the official request for adding functionality for scheduling ads based on local timezones. If scheduling ads based on a local timezone is a critical feature for you, please contact us (using our contact form) and we can provide you with options for custom development, etc.