The Reminder app allows regular Jira users to set reminders from any JIRA issue. You will get a notification with a link to a Jira issue and an optional message from Jira on the specified date and time.

What kinds of reminders exist?
As for an addressee, there are the following:
- personal
- group (addressed to all group members)
As fo periodicity, there are:
- single-time
- and periodical reminders
Who can create and manage reminders?
Permissions of creating, browsing and managing reminders are set up by Jira Administrator (check the Administrator's Guide).
Where can I check my reminders?
There is a special section where you can browse all your upcoming reminders. Also, the issue-related reminders are available for you within the special section in the issue view.