Esther 9:27
“The Jews ordained, and took upon them, and upon their seed, and upon all such as joined themselves unto them, so as it should not fail, that they would keep these two days according to their writing, and according to their appointed time every year;”
KJV
Read in Esther 9Meaning
The name itself makes remembered threat part of the festival, ensuring that celebration does not erase the danger that preceded it.