Arduino based motion sensor project -- Please Help

I am new to using an Arduino and I'd like to know is there ANY way possible to use an Ardunio to make a motion sensor that detects movement then responds with a pre-constructed phrase via speaker, while possibly integrating a calendar and time mechanic so that it responds cleverly. And if so, how would I go about doing this?

An example someone would enter a room and the sensor would say, "Good morning Master," or "Merry Christmas" through the speaker.

RTC and PIR?

Yes, I would like to incorporate both RTC and PIR.

The "Good morning, master" vs. "Good morning, mistress" is going to be tricky.

Make a start on the RTC and the PIR - there are plenty of examples to get you started.