Hello, I'll try to clarify the maximum of my doubt, let's break it down:
My user will schedule a task with a date and time set, for example, marked a task on October 20, 2017 at 3:00 PM, and other users will see this task marked, this information will go to a backend. / p>
How could I send a push notification on October 20, 2017 at 2:00 p.m. (1 hour before) to confirm the confirmation of this task?