Outlook Signature using VBA

Not sure if this is possible but I thought I would ask. We have different email signatures that we use throughout our company. We want to change these signatures monthly for all users. Is there a way to have it use a specific email signature for a given month? For example if we had SignatureA, SignatureB, and SignatureC and wanted to use SignatureA for January, February, and March. And then SignatureB for April, May, and June. And then SignatureC for the balance of the year. Could this be done in VBA code so the users don't have to remember to switch the signature? Or maybe have a list of the signature names in an Excel file with date ranges and have Outlook look at this file before it sends an email to see which signature to use based on the current date. But something like this would need to be set up on all my users Outlook program.