[MrsEmmaPeel]

about 10:18 AM Tehran time.

Ok, I think I figured out the significance of the time-- help me out here, if I'm wrong.
Tehran is +3.5 hours from GMT.
The Spring Equinox is at:(GMT) March 20, 6:50:54 AM
This translates to March 20, 10:20 am. Tehran time

So, it looks like the New Year begins at the Sping Equinox, right?

[Eala]

I don't know the reason behind the exact time, I'd only be guessing, though your analysis seems logical. Perhaps the difference between 10:30 AM and 10:18 AM reflects Tehran's offset within the time zone.