Can you format a cell to update it's value after a set amount of time has passed?

Hi, I'm relatively new to Excel and wanted to know if it's possible to format a cell so it adds 1 to the value within itself after a certain amount of time has passed?

For instance, I have a worksheet which contains a persons ID number, their name and their Learning Curve Week. I would like to have the values in the Learning Curve Week column add 1 to themselves each week automatically without having to do it each week manually - there are a lot of people in this record.

Sorry if this is such a noob question but I've searched about Google, this forum and the net trying to find a solution but the only ones i can find refer to automatically updating time and date cells.

Thanks in advance