To find your daughter's house, you could use either a mapper
, to make an overhead picture of the world, or a map viewer
If you wish to change your spawnpoint, then I know of two ways.
1. Using MCEdit
, you can move your "spawnblock" to the desired position. It can be a bit annoying to get used to the controls for the program though.
2. Using MineEdit
, you can copy and paste your current co-ordinates (viewable from program) into the spawnpoint co-ordinates.
I have tried the latter, and it seemed to work, but I ended up spawning 1 block too low. So my body was in the ground, while my head was above the ground. However, no damage is taken from this, and jumping will uproot yourself.
Change back to daytime? It can get a bit annoying, but a program called TimeChanger
will do it. However, I beleive it shan't make the world permanently day. Everytime it goes night, you have to exit to the menu, go to the program, and change the time again.
Note: I haven't tried this out, so it may not work.
I recomend backing up the world first though, just to be on the safe side, if something does go haywire!
Glad to be of any help!