Clearing Date Field (Python Toolbox)

[samuel_e]

Is there a way to set a date field to None within a python toolbox tool? I found a thread from 2017 where the answer was no, but maybe something has changed since then.

For context, my agency has a database of regional developments which we keep updated through a custom python toolbox. If a development encounters a delay or a roadblock, for example, we want to delete the construction date estimates to show that it is open ended.

[DanPatterson]

<Null> is a table's representation of None

Calculate Field example, 

or as a python snippet