I purchased tickets for a 4:20 p.m showing today, but will not be able to make it (due to a repair person coming late to our home). Can I use our two tickets for the same movie, same time, but for the next day (tomorrow, Dec. 6th?). Thanks.

You'll need to go to the manager and have the date changed/updated BUT do it ASAP!!!

You need to exchange tickets before the movie starts

I'm not sure about the next day, but they let me exchange my tix for a later time the same day.

As long as you have both halves of the ticket go to the management desk inside the theater and ask to exchange. Ive never had any Regal give me an issue but i am unaware of official policy.

No i do not think you can and im sorry to hear that

Probably contact management they will work with you