Hi, Istiyak!
I have no access to a machine with 2003 version, just 2010 and a few 2007.
In those versions, go to Programmer tab, Controls group, Design Mode icon, Insert icon, choose ActiveX controls, Additional controls, and check for Microsoft Date and Time Picker Control 6.0 (SP4).
Register it, then insert it into your worksheet, and use this code for the click event to assign the current date:
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Sub ControlName_Click()
ControlName.Value = Int(Now())
End Sub
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Sorry for not being able to assist you further with older Excel versions.
Regards!