Is your issue with handling time for january, having VAPI understading it's January 2024 and not January 2025?
I have been facing this issue, when telling the voice agent i want to know something about the 3rd and its the 24th of december, he understand the 3rd off January 2024.
What i did is that i wrotte a small prompt in the system prompt and the tool itself to make it understand that it has to assume in certain scenario i'm talking about next year.
It took me some times to figure it out. Have tested it a few times for now it works, but indeed i find the tool not always reliable, having an issue fix one day, and facing the same issue the next day...