Conversation so far:
When did the U.S energy crisis happen?
The energy crisis occurred in 1979
What caused the 1979 oil crisis?
The 1979 (or second) oil crisis or oil shock occurred in the world due to decreased oil output in the wake of the Iranian Revolution.
How did Carter deal with the 1979 energy crisis?
On August 4, 1977, Carter signed the Department of Energy Organization Act of 1977, forming the Department of Energy, the first new cabinet position in eleven years
What did the Department of Energy consist of?
The United States Department of Energy (DOE) is a cabinet-level department of the United States Government concerned with the United States' policies regarding energy and safety in handling nuclear material
What else did Carter do during the 1979 energy crisis period?
On March 1, 1979, Carter submitted a standby gasoline rationing plan per the request of Congress.

Question: How long did the rationing go on for?
Self-contained rewrite: How long did the gasoline rationing in response to 1979 energy crisis go on for?