The Annual Cycle of Jewish Holidays in Megillat Esther
“These days are remembered and observed in every generation”, – it says in Megillat Esther (9:28).
The great Kabbalist Rabbi Isaac Luria Ashkenazi – the Arizal (zt”l) – explains that these words refer not only to the events of Purim, but also to all Jewish holidays and significant dates. The events that first took place on these days recur every year on the same date—only in the spiritual realm.
In the language of Kabbalah, the stream of Divine light that brought about a particular supernatural event the first time is once again poured into the world on the anniversary of that event.
This is why, among other things, the inner meaning of the blessing of thanksgiving: “...Who performed miracles in those days, at this time” is as follows: the miracle performed by G-d “in those days”, is repeated once again “at this time”—that is, now, in our own days.
(based on an article by Rav Yuri Goldes)