I already know that this calendar is quite different from Western, but I never knew a ready-to-use component. I would do the following:
Please, look at this ASP.NET
DateTimePicker
control provided in this CodeProject article:
DateTimePicker Web Control[
^].
You can learn how it works and create the similar Hijri Shamsi calendar.
For exact calendar specification and references to converters and other online gadgets, please see:
http://en.wikipedia.org/wiki/Iranian_calendars[
^],
http://en.wikipedia.org/wiki/Solar_Hijri_calendar[
^].
—SA