Scheduled and periodic notifications can be sent at different times according to the user's timezone.

For example, when setting up a notification to be sent at 10am, people in Bamako, Mali (GMT) will receive the notification 5 hours after people in New York, USA (GMT-5). All will receive the notification at 10am, local time. See scheduled sending and periodical sending.

Setting up timezone management is done in the advanced tab of the push notification edition interface.