Mr. Crocker is especially mean on March 15. When Timmy tries to reason with his cruelty, Mr. Crocker can only keep his acid tongue and talk down Timmy. He then follows Mr. Crocker home, and hears that March 15th is a tough day for Crocker. So, Timmy decides to go back in time, see where Crocker went wrong, and maybe fix it so it comes out right. First, he sees Mr. Crocker start his job as a teacher on March 15, 1992, and Mr. and Mrs. Turner, Mom with a baby in tow, move into their present home. Then, he sees Mr. Crocker get a painful dose of humiliation on March 15, 1984, when his fairy proposal is laughed at massively at the same time as Timmy's parents meet. And then, Timmy goes to March 14, 1972, a day before what would be Crocker's worst day. He sees Crocker as a normal, sane little boy, in addition to a town hero, and he has Cosmo and Wanda as fairy godparents. Timmy realizes that March 15 was the day his fairies were exposed to the world, and he tries to stop that from happening. In the end, he causes the very thing that he was trying to prevent, and was then barred from travelling back to March, 1972 ever again. But this time, Mr. Crocker was being chased by old people who first started mobbing him back on March 15, 1972.