What is "The Masque of the Red Death"'s chronology?

This short story by Edgar Allen Poe opens with a
commentary on what had happened recently to the land where the story is based. It has
been plagued by a disease called The Read Death that was sudden and quick in killing
those it infects. However, Prince Prospero seems to be a character who thinks he can
cheat death. He gathers together a thousand of his courtiers and together they lock
themselves in a deserted abbey with all the entertainment they need to divert
themselves. After 5 or 6 months of their seclusion, he holds a very special party. This
party is based in 7 rooms. Each has a different colour and run one after the other,
going in the following order: blue, purple, green, orange, white, violent, black. Each
room is cleverly covered with light of that colour by means of a brazier behind a
stained glass window of the according colour. The one exception is the final room, which
has a red stained glass window. This room is so ghastly that few venture in to it. There
is also in this room a giant black clock. Whenever it struck the hour, it produced a
momentary silence in the revels before people began to party again. It is after this
clock strikes twelve that many become aware of one guest who is described as
representing the Red Death. So outraged by this intruder, Prospero orders that he be
unmasked and punished, yet no-one is able to grasp him as he moves from the blue room
and begins to walk through all of them to the read room. Prospero, enraged, runs after
him himself with a dagger drawn. He meets him in the seventh room, where Prospero drops
dead with a cry. The other guests arrive, grasp the intruder, only to find that there
was no one there underneath the disguise. It is then that the guests realise the Red
Death has penetrated the castle and all of them die within the
hour.