Executive Order 13780. The action is State of Hawai'i and Ismail Elshikh v Donald J Trump and others. Mr Elshikh is Imam of the Muslim Association of Hawai'i.
See CNN News 9th March - Judge to hear Hawai'i lawsuit against new Trump travel ban and The Telegraph 9th March - Hawai'i becomes first State to take legal action against Donald Trump over new travel order
The new Executive Order may be read via the US Federal Register - Protecting the Nation from Foreign Terrorist Entry to the United States. The new Order will replace EO 13769 on 16th March.
Here is the document commencing the case which will be heard in the United States District Court for the District of Hawai'i. The document commencing the case lists 8 grounds of challenge against the new Executive Order.
Update - the hearing is listed for 0930 hrs HAST on 15th March before Judge Derrick K Watson
[Hawai'i is the local spelling of the State's name].
HAST = Hawaii-Aleutian Standard Time ..... 10 hours behind London time.