Lifespan of Starlight Series by Thalia Kalkipsakis

It already lies dormant within you: the ability to move within time.In 2084, three teenagers discover the secret to time travel. At first their jumps cover only a few seconds, but soon they master the technique and combat their fear of jumping into the unknown. It's dangerous. It's illegal. And it's utterly worth it for the full-body bliss of each return. As their ability to time jump grows into days and weeks, the group begins to push beyond their limits, with terrifying consequences... moreIt already lies dormant within you: the ability to move within time.In 2084, three teenagers discover the secret to time travel. At first their jumps cover only a few seconds, but soon they master the technique and combat their fear of jumping into the unknown. It's dangerous. It's illegal. And it's utterly worth it for the full-body bliss of each return. As their ability to time jump grows into days and weeks, the group begins to push beyond their limits, with terrifying consequences. Once you trip forwards, there's no coming back. less

A split-second decision, a single time-skip. The world that you know, gone in a blink. Now a sharp and adept time-skipper, Scout jumps years ahead to find the world transformed. Technology has accelerated and the people she knows have grown up, or disappeared. Most pressing, the government that she was trying to escape has used the time to prepare for the return of the time skippers... moreA split-second decision, a single time-skip. The world that you know, gone in a blink. Now a sharp and adept time-skipper, Scout jumps years ahead to find the world transformed. Technology has accelerated and the people she knows have grown up, or disappeared. Most pressing, the government that she was trying to escape has used the time to prepare for the return of the time skippers.Caught between finding the mother she left behind and time-skipping ahead with Mason, a series of events lead Scout deeper into the tunnel than ever before.The only way out is by the strength of her love and the power of her mind. The illusion of time has one more surprise, one with the power to change everything. less