hey guys i found a useful website. it's about to convert hijri shamsi date to it's equal miladi. if you want to know when is your birthday in miladi calendar, or anything else like that, then you can use it.
click here to go to the wbsite.
I don't know why but the online converter (the above link) is filtered for Iranian users, so in this new link you can download a local program to do the job. thanx to the developer and here is the link:
Note that this program requires .NET Framework v3.5 to be installed.
but if you still wanna use the online version here is another one with ability to convert Hijri dates also.