- 1810
- April- Irma Boissy is born to Honoré and Marie Boissy, a parisian couple.
- 1812
- May- Irma's twin brothers René and Martin, are born after a long labour that almost kills Marie.
- September- Irma's father, Honoré, is promoted in his job as a clerk.
- 1820
- December- In the mid of one of the coldest nights the Boissys will ever remember, Agnès, the fourth Boissy child, is born. Much to the joy of Irma, she has now a baby sister she can play with.
- 1825
- March- The fifth and final Boissy child, Alexandre, is born.
- 1828
- November- After a long illness, Honoré dies. As she knows the savings of her parents are not enough to support a family of five children, Irma manages to get a job at a shoe factory to help support her family the next week.
- 1830
- May- Irma meets Grantaire for the first time.
- Sometime within the following months, they start their relationship
- 1831
- Sometime before May, Irma breaks up with Grantaire. The sentence "Grantaire is impossible" is said to a coworker when Irma is asked what happened with that student that used to accompany her.
- 1832
- July- The Barricades. Irma manages to keep all her family safe and sound, despite the fact that the twins threaten to join the students.
- Sometime after knowing the news, she visits the Café Musain when it's almost going to close for the day, and asks the owner to tell her the stop where Grantaire's body was found. Every year after that there's a flower on that same spot.
- 1834- The timeline with the officer.
- Sometime between April and May- The Officer and Irma meet. There's sadness and heartbreak. And it does not end well.