You just look at it while it is in your inventory, or hotbar. It shows if it is day or night, nothing more.
To use a clock in Minecraft, just simply look at it. It tells you the time, as if the sun is up then the sun will be up in your world and in that position.
A clock in Minecraft is a handheld item, it can't be placed like a decorative block. However what you can do is craft an Item Frame and put that on the wall, then put the clock on the item frame. That way you then have a wall-mounted clock.
You build a clock although this does not show the most accurate it shows you (if you where mining) What the time will be outside. Or you could just look at the sun and estimate what the time is.
You have to put it in an item frame by right clicking on it with the clock. It's the same with survival.
use an item frame and put the clock in it, this works with any item, including maps
Just look at what it is showing. The clock only shows if it is day or night, it's only really of any use when you are deep underground, ie, you could choose to mine while it is night time, using the clock to see when it is day before heading back up.
Show me how 132 p.m. look on the clock
The 1st of july. I don't know the clock time.
You can't do that. Notch named clocks wrong, they are actually watches.
Have a look at Minecraft Forums it should tell you, or you can go to Minecraft.net or Minecraft Wiki.
A folder called .minecraft
This is not the place to find out about Minecraft. Look at the Minecraft Wiki to find out about the game in general.