Hello,

I looked everywhere for a solution but I can't find anything that would work for SharePoint 2013 and SharePoint Designed 2013.

I tried:

1) setting the date to 0/01/0001 - I get workflow errors

2) copying the date from a already blank column - the copy is completely ingored

Anybody had any success in clearing the date field in the 2013?

Thank you

Did you try to set the null value? Refer to following post for more information

https://www.nothingbutsharepoint.com/2010/01/22/how-to-set-a-column-to-null-with-spd-aspx/