Because our globe is tilted on its axis, the sun's path through the sky changes throughout the year. The sun would rise and set later than usual in the spring and fall after the equinoxes, but sooner than usual in the summer and winter after the solstices. Days are getting longer as we move into spring, so there's no reason for the sun to set any later than it does now. The earth's rotation is also affected by the presence of other planets. In particular, the axis of Earth's rotation is always held almost upright by the gravitational force of Jupiter, which prevents it from spinning completely around its axis. So even though days get longer as we move into spring, night won't necessarily come earlier; instead, the planet will just keep rotating at a constant speed throughout the year. But this doesn't mean that spring comes late every time Jupiter is found in a different position in the sky. Sometimes it aligns with other stars or galaxies to create unusual astronomical events such as solar eclipses or supernovas. So although you can't predict when spring will arrive, you can look up in the sky and find out what's going on with respect to gravity fields all over the universe.