[wplug] a home automation question

[vze2f6h6 at verizon.net]

I a snake enclosure that I want to be able to control the heating of based on the temp. inside of it.  Basically, I want my box to act like a thermostat, except be able to adjust the temp setting based on a specific time.  Like set it to 85 degrees from 7:00am - 8:00pm and 80 degrees from 8:00pm - 7:00am.  Is there anything out there that already does this?  How hard would it be to do this?  Is it possible?

Thanks,
Chris