# IfcTask diagram needs updating

**URL:** <https://forums.buildingsmart.org/t/ifctask-diagram-needs-updating/3576>\
**Category:** Developers\
**Created:** [April 30, 2021, 6:51am UTC](https://forums.buildingsmart.org/t/ifctask-diagram-needs-updating/3576 "2021-04-30T06:51:41Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Moult](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/moult/32/196_2.png) [@Moult](https://forums.buildingsmart.org/u/Moult)\
**Post date:** [April 30, 2021, 6:51am UTC](https://forums.buildingsmart.org/t/ifctask-diagram-needs-updating/3576/1 "2021-04-30T06:51:41Z")

</div>

In the below diagram, `IfcCalendarDate` no longer exists and should be removed.

 ![image](https://us1.discourse-cdn.com/flex016/uploads/buildingsmart1/original/2X/f/f7e4415674d90621b8f9333865b9292f4cd2c507.png)