Mass closing of opportunities

Summary:

We want to perform an automatic mass update of all opportunities in our CRM system, so that for all open opps with last update date before January 1st 2023,

sales stage will be set to close/lost.

We tried to create an object trigger to help mark only the relevant opps, but the formula isn't working.

The formula is based on different examples from the available Date function in the system.

How can we amend it so it works properly ?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

24A (11.13.24.01.0)

Code Snippet (add any code snippets that support your topic, if applicable):