Same-day or overnight: Porbandar from Somnath
When a Madhuli taxi to Porbandar should come back the same day, and when the honest plan is a night halt.
If Porbandar is only a halt, say so. A full city tour is a different day. The drive itself is about 2.5 hours and about 125 km. Double it, then add darshan, and you can see whether a return belongs in the same sunset.
Porbandar is the calm halt between Somnath and Dwarka: Kirti Mandir, Sudama Mandir and a long beach. A one-way drop and a car that stays are different jobs. Say which one you want in the enquiry so the driver is not guessing at the hotel gate.
It works as its own day, or as an hour on the Dwarka morning.
If you already have a hotel, send the area. If you do not, the desk can still run the cab. Hotel booking stays yours unless you ask for an area that is easy at dawn.