The OneSignal Dashboard detects timezone according to your Operating Systems time.
Selecting Begin sending at a particular time will allow you to set when the notifications will start to be sent. That time is displayed on the bottom right circled in red in the image.
Notifications will be delivered to users based on the Per-User Optimization selection.
Per-User Optimization Limitation with Throttling
If you selected the Throttling
option, then Intelligent Delivery and Timezone sending will be ignored.
Message Throttling takes precedence over Intelligent Delivery and Timezone sending.
Intelligent Delivery is a unique feature of OneSignal that optimizes notification delivery time based on when each user most frequently access your app or website and is the best way to optimize notification open rates.
Each time a device accesses your website or mobile app with our SDK active, our SDK tracks their Last Session and notes the hours in which these devices most commonly return. This is based on up to a 3 month rolling average of a user's past actions.
With Intelligent Delivery, each user will receive your notification within 24 hours of you initiating delivery. For example, you sent a message at 7 PM and the user is most likely to open the app/site at 1 PM, the notification will be delivered 18 hours later (at 1 PM the following day). If your notification is very time-sensitive we instead recommend either Sending Immediately (which initiates delivery right away to all users, regardless of their activity or timezone) or Time Zone optimization (to deliver at the same time across user timezones).
Optimize by the user time zone
Once you schedule the notification to go out, you can set the delivery based on each device's set timezone. This is based on the device's settings.
So if you want a notification to be delivered to all your users in different timezones at 1PM for example, you can do this with OneSignal!
Keep in mind that if a timezone has already passed when you start sending this notification, they will get the notification at the set timezone, the next day. So it is important to make sure you start sending 24 hours before