How to know when "Assigned to" has been registered for the first time

[Kentaro Numata]

Happy new year everyone. It's Kentaro.
Thank you for your continued support this year.

I'm looking for a way to know when "Assigned to" has been updated for the first time.
Because I want to update a specific Date column when "Assigned to" is updated for the first time.
Isn't there a similar way to know when a record was first registered using a function?

Thanks,
Kentaro.

[-O-]

You're welcome.

I hope it helps; let us know if you need further assistance.

János