Mixed connective tissue disease (MCTD) is a rare autoimmune disorder. An autoimmune disorder is one in which the immune system mistakenly views the bodyâs own tissues as âinvadersâ and attacks them.ixed connective tissue disease has features of three other connective tissue diseases: 1  Systemic lupus erythematosus (SLE) â An inflammatory disease that can affect many different organs. 2  Symptoms include fever, fatigue, joint pains, weakness, and skin rashes on the face, neck, and upper body.
Almost all of the US state of Arizona does not use Daylight Saving Time (DST), and uses the time zone Mountain Standard Time (MST) all year.
how many states dont change their clocks for daylight savings time and who. Arizona (with the exemption of the Navajo Nation) and Hawaii are the only states in the U.S. that do not observe Daylight Saving Time however instead stay on standard time all year long. The federal law that founded daylight time in the United States does not require any area to observe daylight saving time. But if a state decides to observe DST, it must follow the starting and ending dates set by the law.