A Red Letter Day
is known universally
as a special day or
a day that is highly
significant or of
extreme personal significance
to an individual!
In
the year 325 The First
Council of Nicaea
decided that Saints
Days, feasts and other
Holy Days should be
printed in Red so
they stood out.
1549 this was extended
to the First Book
of Common Prayer where
holy days were printed
in red ink on the
calendar.
Red Letter Day is
a generic term now
and is widely used
throughout the world
as a day that holds
special significance
to someone. Examples
of such days that
might be classed as
a red letter day would
be weddings,
Christenings or another
day where you do something
special or once in
a lifetime.
You will find that
many modern day diaries
will highlight special
occasions or important
days in red, likewise
many people write
important entries
into diaries or calendar
in red so they they
stand out and are
not missed so this
is another reason
for the generic use
of the term Red Letter
Day.