Time stamp when trader enters his starting work hours as well as end of his shift.

Hello All! Hope U dont mind if i missed right thread but dont really know where to place following.
I want to get time stamp when trader enters his starting work hours as well as end of his shift.
Colum C - traders enters time , column D - time stamp ; column E - time stamp of last change (same thing with end of shift but from column F)
1. Is it possible to adjust formula in column D that will remain as it is from first input data in column C ( bc if you now change C it will change in D as well) or is it better to somehow make C editable but not deleteable - so traders can only input data and not delet it
File will be on OneDrive and will be shared with 6-10 people who will sometimes be using the same file in the same time (just mentioning that in case of vba code - if that is only solution)

Administrative Note:

Welcome to the forum.

We would very much like to help you with your query, however the thread title does not really convey what your request is about. Tell us what you are trying to do, not how you think it should be done.

Please take a moment to amend your thread title. Make sure that the title properly explains your request. Your title should be explicit and not be generic (this includes function names used without an indication of what you are trying to achieve).

Please see Forum Rule #1 about proper thread titles and adjust accordingly. To edit the thread title, open the original post to edit and then click on Go Advanced (bottom right) to access the area where you can edit your title.

(Note: this change is not optional. As yo uare new here, I have done it for you this time.)