Remove date/time from table

I have a table with multiple columns including date/time, when I need to clear all values in a given row I just set the tag for each cell to zero ie: (system.tag.writeToTag(‘M100’, 0) but im not sure how to clear the date/time cell. Is there a way to set the memory tag that holds the date/time to null or “0”?

Thank you.

Are you talking about the client tag “System/Client/System/CurrentDateTime”? Those tags are immutable.

How exactly are you bringing the date/time into the table?