Timeline of Events

1945

 * Max Tennyson is born.

1994

 * Kevin Levin is born.

1995

 * Ben Tennyson and Gwen Tennyson are born.

2005

 * The events of the Original Series take place.
 * Character Ages
 * Ben Tennyson: 10
 * Gwen Tennyson: 10
 * Kevin Levin: 11
 * Max Tennyson: 60
 * The events of "Ben 10,000" do not happen yet.
 * The events of "Race Against Time" and "Goodbye and Good Riddance" take place roughly within the same week.
 * Gwendolyn Tennyson alters the timeline by transporting Ben and Gwen 20 years into the future, this sends present-day Ben in the direction of the Ben 10: Alien Force timeline, and retcons the rest of Re:Verse out.
 * As a result, the events of "Race Against Time" and "Goodbye and Good Riddance" do not take place, and the events of "Ben 10,000" do.

2010

 * Ben mutilates Vilgax.
 * Character Ages
 * Ben Tennyson: 15
 * Gwen Tennyson: 15
 * Kevin Levin: 16
 * Max Tennyson: 65

2017

 * In preparation for the impending Limax War, the Plumbers and S.A.C.T. form an uneasy alliance.
 * During this time, S.A.C.T. develops the OSMOS Project in a series of four phases.
 * The Limax War takes place.
 *  Character Ages 
 * Ben Tennyson: 22
 * Gwendolyn Tennyson: 22
 * Kevin Levin: 23
 * Max Tennyson: 76

2025

 * Gwendolyn Tennyson opens a time portal bringing her and Ben's younger self into the future.
 * The events of "Ben 10,000" take place.
 * Character Ages
 * Ben Tennyson: 30
 * Gwendolyn Tennyson: 30
 * Kevin Levin: 31
 * Max Tennyson 80

2026

 * Devlin Levin is born.

2027

 * Kenny Tennyson is born

2037

 * The events of "Ken 10" take place.
 * Character Ages
 * Ben Tennyson: 42
 * Gwendolyn Tennyson: 42
 * Kevin Levin: 43
 * Max Tennyson: 92
 * Kenny Tennyson: 10
 * Devlin Levin: 11