Pesach is the foundational holiday of the Jewish people, and the Exodus is the defining moment of Jewish history. A group of slaves formed a nation that, a mere seven weeks, later stood at Sinai so they could become a nation of priests and a holy nation. Mitzvah after mitzvah is observed zecher lyetziat mitzraim, to remember the Exodus. And these mitzvoth are in addition to the stand-alone mitzvah to remember the Exodus.
It is the holiday of Pesach that celebrates our becoming a nation and is the cornerstone of Judaism. Remembering the Exodus provides the backdrop to so many of our mitzvoth, whether it is Shabbat or Yom Tov, tefillin, mezuzah, kindness to strangers, or our sexual ethics. On Pesach, we focus on the meaning of freedom; but the mitzvah to remember the Exodus, zechirat yetziat mitzraim, is one that must be fulfilled each and every day, if by nothing more than mentioning it in our davening.