How to power up the PC?

I am not sure what you mean to say.

Anyways what i want is i will set time and date in windows form kind of thing(in a stand alone PC) then if i go to windows button and click shut down button and then based on the time and date it should turn on. That is what i mean to say. Hope you will clear this time. I hope there should be a way to do this.

It depends on what you mean by turned off. If you mean pushing the power button (the physical button) then no it does not actually turn the power off. For smart phones, turning the power off so that the processor does not execute and the phone does not use power means that you need to shutdown the system. I am not sure I even know how to do that using my phone. I have a Droid X. If I hold the power button down for a few seconds then I get a window with a few options, one of which is to Power Off. I assume that powering off that way is different from powering off when I press the power button for a second or less.

Programs such as Lookout Security & Antivirus can turn on a phone's GPS (if it is off) in the phone and get the phone's location without the person with the phone knowing that is being done, all from a server someplace. This is done for security so if a phone is stolen, the phone's owner can determine the location of the phone but the thief does not know it is being done and the phone's owner does not want them to be able to stop it. The phone's owner just uses a browser and an internet connection to request that Lookout get the phone's location.

EveryTrail can keep track of where you are when hiking so then you can upload that information for future reference. EveryTrail can track your location because it executes on a timer to periodically get the location.

You mean to say that even though the mobile phones are turned off it still executes some machine instructions in the background.

Sometimes we must think about things. How is the PC going to turn itself on when it has no power? There is no power going anywhere when a PC is turned off. Well, okay; I guess there is normally a green light on the system board (motherboard) that is on even when the power is off to the rest of the system, but there is no power going to anything that executes machine instructions or anything that can turn on the PC. There might be system boards that have the feature you are seeking but it is not a feature of most system boards.

What mobile turns itself on when it is turned off? Note that smart phones have a switch that turns off the display but it does not turn off the processor from executing. The processor continues to execute some programs. That is the reason why the batteries of smart phones drain so quickly. Supposedly law enforcement can turn on a phone that is turned off and that is very much like what a PC does for a wake on LAN. Do you know of any phone that can turn itself on when it has been powered off? I don't mean the type of off that we usually do with smart phones; with smart phones, I mean the same thing as shutting down the system and then the system must be restarted (rebooted) before it does anything. When a smart phone is truly off, it does not receive calls.

Is it so can't we turn on the PC based on time just like our mobile does. If I had to do it using LAN i would skip doing this program completely which is not of my interest. I hope there should be a way to do that, if not that's a pretty disgusting thing. If it can't be done can you explain me how come mobiles do that not the PC's!