Why not? This is due to Earth's 23.5 degree axis tilt and Earth's revolution about the Sun. As Earth revolves around the Sun, the position of the Sun at rise and set time changes. As the days proceed from the first day of Spring to the first day of Summer, the Sun's rise position slowly shifts to the North East. Note the diagram (for someone standing in Earth's northern hemisphere) below showing Sun rise and set positions at different times of the year.
This is a hard misconception to remove from the brains of high school students. Everyone thinks that the Sun rises in the East, but the key is that it rises SOMEWHERE in the East. Take a look at the rise position of the Sun at different times of the year. You've all done this before without realizing it. Every Spring and Fall we complain about the Sun being in our eyes when we drive to work and/or home from work. How many of you have been driving to work in the morning near the first day of Spring or Fall and come to a stop at a stoplight but can't see when the light changes because the Sun is right there, blasting into your eyes? Happens to me every equinox. But a couple of week's later it's not a problem because the rise position of the Sun has changed. Show this to your kids sometime, but be careful and explain to them that they shouldn't stare directly at the Sun.