**As** an OpenProject user
**I want** to receive an Begin of the deletion emailEnd of the deletion notification Begin of the insertionbeforeEnd of the insertion Begin of the deletion when the due date ofEnd of the deletion a work package Begin of the insertionbecomes overdueEnd of the insertion Begin of the deletion (or a custom field of type date) is approaching (or is overdue)End of the deletion
**so that** I Begin of the insertionsave time and energy toEnd of the insertion Begin of the deletion doEnd of the deletion not forget important deadlines.

**Use case (example)**

* Begin of the insertionRecurring tasks such as
* testing the backupEnd of the insertion Begin of the deletion A ticket of type bill or invoice has been createdEnd of the deletion and Begin of the insertionrestore procedure
* doing feedback conversations with team members
* checkingEnd of the insertion Begin of the deletion needs to be paid. The user can easily forget to payEnd of the deletion the Begin of the insertionlogged time invoicing the customersEnd of the insertion Begin of the deletion bill if not reminded.End of the deletion

**Acceptance criteria**

* Begin of the insertionNotifications canEnd of the insertion Begin of the deletion Timeframe for reminder shouldEnd of the deletion be Begin of the insertionadded for single work packages that are triggered by a rule.End of the insertion Begin of the deletion configurable.End of the deletion
* Begin of the insertionNotifications canEnd of the insertion Begin of the deletion Reminders shouldEnd of the deletion be Begin of the insertionmutedEnd of the insertion Begin of the deletion sentEnd of the deletion for Begin of the deletion both end dates ofEnd of the deletion work packages Begin of the insertionthat are triggerd by a rule.End of the insertion Begin of the deletion and custom fields of type date.End of the deletion
* Begin of the insertionIt isEnd of the insertion Begin of the deletion For custom fields of type date it has to beEnd of the deletion possible to Begin of the insertionsetEnd of the insertion Begin of the deletion define whetherEnd of the deletion a Begin of the insertiontimefrane to get notified in advance
End of the insertion Begin of the deletion reminder should be sent (if a relevant end date is referenced) or not (e.g. when a start date is referenced).

To be discussed

End of the deletion * Begin of the insertionDays
* WeeksEnd of the insertion Begin of the deletion should this be available for start dates, too?End of the deletion
* Begin of the insertionNotifications canEnd of the insertion Begin of the deletion ~~can the Redmine functionEnd of the deletion be Begin of the insertionhidden for a specific period ("auf Wiedervorlage setzen".End of the insertion Begin of the deletion used? (see respective comment)~~ (It will not match the desired functionality, e.g. it cannot be modified from the UI and it will be user independent)End of the deletion

**Visuals (very preliminary):**

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/19061/content" alt=""></div></figure>

* [Related visuals](https://docs.google.com/presentation/d/1JV0cJcP6UWNc_TgCMIeBKt7-7M7VFZ4E/edit#slide=id.p1)