More than safe, it would be the best option to abolish it completely.
In brief, our bodies evolved in the the movement of the sun, not numbers on a clock, so called solar time. Standard time aligns the numbers on the clock the best with solar time for most all of the world. There are some exceptions along the equator and at the poles at different times of year, but those are exceptions that have been, and can continue to be, handled well by people in those areas.