ISO
8601:2000(E)
18
©
ISO
2000
All
rights
reserved
5.3.4.2
Local
time
and
the
difference
with
Coordinated
Universal
Time
When
it
is
required
to
indicate
local
time
and
the
difference
between
local
time
and
UTC,
the
representation
of
the
difference
shall
be
appended
to
the
representation
of
the
local
time
following
immediately,
without
space,
the
lowest
order
(extreme
right-hand)
component
of
the
local
time
expression,
which,
in
this
case,
shall
always
include
hours.
The
difference
between
local
time
and
UTC
shall
be
expressed
in
hours-and-minutes,
or
hours-only
independently
of
the
precision
of
the
local
time
expression
associated
with
it.
The
complete
representation
of
the
time
of
27
minutes
46
seconds
past
15
hours
locally
in
Geneva
(normally
one
hour
ahead
of
UTC),
and
in
New
York
(five
hours
behind
UTC),
together
with
the
indication
of
the
difference
between
the
local
time
and
UTC,
are
used
as
examples.
Basic
format:
hhmmss
±
hhmm
EXAMPLE
152746+0100
1527460500
hhmmss
±
hh
152746+01
15274605
Extended
format:
hh:mm:ss
±
hh:mm
EXAMPLE
15:27:46+01:00
15:27:4605:00
hh:mm:ss
±
hh
15:27:46+01
15:27:4605
In
these
expressions
the
local
time
component
may
be
represented
with
reduced
precision
as
defined
in
5.3.1.2
or
with
decimal
fraction
as
defined
in
5.3.1.3.
5.4
Combinations
of
date
and
time
of
the
day
When
the
application
does
not
clearly
identify
the
need
for
only
a
date
expression
(see
5.2)
or
only
a
time
of
the
day
expression
(see
5.3),
then
a
time-point
can
be
identified
through
a
combination
of
date
and
time
of
the
day
representations
provided
for
in
this
International
Standard.
5.4.1
Complete
representation
The
components
of
a
time-point
shall
be
written
in
the
following
sequence
a)
For
calendar
dates:
year
-
month
-
day
-
time
designator
-
hour
-
minute
-
second
-
zone
designator
b)
For
ordinal
dates:
year
-
day
-
time
designator
-
hour
-
minute
-
second
-
zone
designator
c)
For
week
dates:
year
-
week
designator
-
week
-
day
-
time
designator
-
hour
-
minute
-
second
-
zone
designator
The
zone
designator
is
empty
if
use
is
made
of
local
time
of
the
day
in
accordance
with
5.3.1.1
through
5.3.1.3,
it
is
the
UTC
designator
[Z]
if
use
is
made
of
UTC
in
accordance
with
5.3.3
and
it
is
the
difference-component
if
use
is
made
of
local
time
and
the
difference
with
UTC
in
accordance
with
5.3.4.2.
The
character
[T]
shall
be
used
as
time
designator
to
indicate
the
start
of
the
representation
of
time
of
the
day
in
date
and
time
expressions.
The
hyphen
[-]
and
the
colon
[:]
shall
be
used,
in
accordance
with
4.5,
as
separators
within
the
date
and
time
of
the
day
expressions
respectively,
when
required.
NOTE
By
mutual
agreement
of
the
partners
in
information
interchange,
the
character
[T]
may
be
omitted
in
applications
where
there
is
no
risk
of
confusing
a
combined
date
and
time
of
the
day
representation
with
others
defined
in
this
International
Standard.
