**As** an OpenProject user
**I want** to see in the Gantt chart the changes that have been made when compared with a date in the past
**so that** I better understand the progress and the status of my project.

**Solution concept:**

* A user can set a date in the past.
* For the filter results also the values in the past are loaded from the API and presented in the frontend.
* There are two options to set a date in the past:
* A: A specific date, e.g. 2022-01-01
* A: A relative date, e.g. 7 days ago Begin of the insertion
End of the insertion Begin of the deletion

**Option A: Filter on historic values** <mention class="mention" data-id="21151" data-type="work_package" data-text="#21151"><strong>#21151</strong></mention>

End of the deletion * It is possible to filter on historic values in the past, e.g.
* All work packages that have been in status &quot;scheduled&quot; on Begin of the insertion2022-01-01
End of the insertion Begin of the deletion 2022-01-0
End of the deletion * Begin of the insertionAll work packages that were assignedEnd of the insertion Begin of the deletion This allowsEnd of the deletion to Begin of the insertionverion 12.1 and all work packagesEnd of the insertion Begin of the deletion also show elementsEnd of the deletion that have been added or removed Begin of the insertionsinceEnd of the insertion Begin of the deletion fromEnd of the deletion a Begin of the insertionspecific date.End of the insertion Begin of the deletion list.End of the deletion

Begin of the insertion**VisualEnd of the insertion Begin of the deletion **Option B: Show historic valueEnd of the deletion for Begin of the insertionlist view**End of the insertion Begin of the deletion the current filter result.**End of the deletion

Begin of the insertion<figure class="image op-uc-figure" style="width:75%;"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/26988/content"></div></figure>End of the insertion Begin of the deletion * Filter on the current values.
* Show historic values for the filter results.End of the deletion