"On the first day [of Pesach] you shall have a holy day..."
We are commanded to refrain from all work, except for cooking and some
other food preparations, on the first day of Pesach (two days in chutz
Pesach is called "zeman cheiruseinu," the time of our freedom.
This holiday is very significant because it commemorates yetzias
Mitzrayim, which is the founding of our nation as Hashem's people.
Once a year, on Pesach, we reinforce our recognition of our unique status
and renew our relationship with Hashem through the seder, whose impact
lasts throughout the year.