We've talked about this before, so i'm assuming you didnt see which is fine and understandable. Basically, singleplayer this is possible - on maps with the dynamic sky such as gm_construct, but it wont work if any of the following are true

- The map doesn't use the dynamic sky
- There is some other dynamic sky mod installed
- The dynamic sky is set to anything but day by default
- Any game with more than one player (servers)
- Probably some more, these are off the top of my head

There is too much that could ♥♥♥♥ it up, mainly no server support - that makes this not worth my time, sorry.

If you want to travel through time with this tardis, consider the following.

Step one: activate vortex flight mode and wait in vortex for any amount of time that you want

Step two: re-materialize

Step three: pretend you were in the vortex for only *insert short amount of time here*

Now, if there was a map that had like a main area, and a mirrored verison of that, but older looking, that could work. That's probably the closest you can get, though.