I'm trying to come over there on the 21st of December 2019, it will be a birthday get to there, do I need to make a reservation??

Yes make a reservation

I'm going to make the reservation tomorrow morning, I really appreciate everyone who took their time to respond to my question, it made me feel very special, and also made me know that it a great place to go eat at. Thank you all

Yes

You're definitely going to want to make a reservation.

Yes. They will be crowded and for the full Tepan experience, you will likely need a reservation.