A video camera’s built-in “time-lapse” effect is not smooth at all (the way we are used to seeing it.)
In FILM time-lapse, only one or two FRAMES are exposed at a time (calculated on the length of the end-result desired.)
This gives a very smooth look to the completed sequence (and the illusion of the actual event merely speeding up.)
In-camera VIDEO “time-lapse” (using timed SECTIONS of recording, not single frames) yield a “start-stop” jerky pattern on playback.
If this is OK for your purposes, got for it!
But, it is quite possible to EDIT-DOWN from a tape that was recorded in this start-stop manner to create the 1 or 2-frame smooth finished look of a film.
(In FCP, capture the tape and edit out all but 1 or 2 frames per “exposure.”)
The real difference is in how you set up the shoot.
You will need to make far more “exposures” over the 12 hours because your edit would “eat-up” 15 (2-frame) or 30 (1-frame) clips per SECOND of finished work so you need to decide how LONG the finished work needs to be. (There’s that math stuff again.)
There is also computer software that will “record” smooth single-frame time-lapse from your FireWire camera direct to a laptop or tower computer’s hard-drive (don’t need to use tape in the camera at all.)
Here’s a link for one such (Mac) product:
https://www.bensoftware.com/
Do a Google search for more info.