<s>
Google	B-Application
Calendar	I-Application
is	O
a	O
time-management	O
and	O
scheduling	O
calendar	B-Application
service	O
developed	O
by	O
Google	B-Application
.	I-Application
</s>
<s>
It	O
became	O
available	O
in	O
beta	O
release	O
April	O
13	O
,	O
2006	O
,	O
and	O
in	O
general	O
release	O
in	O
July	O
2009	O
,	O
on	O
the	O
web	B-Application
and	O
as	O
mobile	B-Application
apps	I-Application
for	O
the	O
Android	B-Application
and	O
iOS	B-Application
platforms	O
.	O
</s>
<s>
Google	B-Application
Calendar	I-Application
allows	O
users	O
to	O
create	O
and	O
edit	O
events	O
.	O
</s>
<s>
Users	O
can	O
enable	O
or	O
disable	O
the	O
visibility	O
of	O
special	O
calendars	B-Application
,	O
including	O
Birthdays	O
,	O
where	O
the	O
app	O
retrieves	O
dates	O
of	O
births	O
from	O
Google	B-Application
contacts	O
and	O
displays	O
birthday	O
cards	O
on	O
a	O
yearly	O
basis	O
,	O
and	O
Holidays	O
,	O
a	O
country-specific	O
calendar	B-Application
that	O
displays	O
dates	O
of	O
special	O
occasions	O
.	O
</s>
<s>
Over	O
time	O
,	O
Google	B-Application
has	O
added	O
functionality	O
that	O
makes	O
use	O
of	O
machine	O
learning	O
,	O
including	O
"	O
Events	O
from	O
Gmail	B-Application
"	O
,	O
where	O
event	O
information	O
from	O
a	O
user	O
's	O
Gmail	B-Application
messages	O
are	O
automatically	O
added	O
to	O
Google	B-Application
Calendar	I-Application
;	O
"	O
Reminders	O
"	O
,	O
where	O
users	O
add	O
to-do	O
activities	O
that	O
can	O
be	O
automatically	O
updated	O
with	O
new	O
information	O
;	O
"	O
Smart	O
Suggestions	O
"	O
,	O
where	O
the	O
app	O
recommends	O
titles	O
,	O
contacts	O
,	O
and	O
locations	O
when	O
creating	O
events	O
;	O
and	O
"	O
Goals	O
"	O
,	O
where	O
users	O
enter	O
information	O
on	O
a	O
specified	O
personal	O
goal	O
,	O
and	O
the	O
app	O
automatically	O
schedules	O
the	O
activity	O
at	O
optimal	O
times	O
.	O
</s>
<s>
Google	B-Application
Calendar	I-Application
's	O
mobile	B-Application
apps	I-Application
have	O
received	O
polarized	O
reviews	O
.	O
</s>
<s>
2015	O
reviews	O
of	O
the	O
Android	B-Application
and	O
iOS	B-Application
apps	O
both	O
praised	O
and	O
criticized	O
the	O
design	O
.	O
</s>
<s>
The	O
integration	O
between	O
Google	B-Application
Calendar	I-Application
and	O
Gmail	B-Application
was	O
praised	O
,	O
however	O
,	O
with	O
critics	O
writing	O
that	O
"	O
all	O
of	O
the	O
relevant	O
details	O
are	O
there	O
"	O
.	O
</s>
<s>
Google	B-Application
Calendar	I-Application
allows	O
users	O
to	O
create	O
and	O
edit	O
events	O
.	O
</s>
<s>
Users	O
can	O
optionally	O
set	O
notifications	O
,	O
with	O
options	O
for	O
type	O
(	O
email	O
,	O
mobile	O
push	B-General_Concept
notification	I-General_Concept
)	O
and	O
time	O
.	O
</s>
<s>
Users	O
can	O
invite	O
other	O
people	O
to	O
events	O
;	O
for	O
other	O
Google	B-Application
Calendar	I-Application
users	O
,	O
the	O
event	O
becomes	O
visible	O
in	O
their	O
calendar	B-Application
,	O
and	O
for	O
non-Google	O
Calendar	B-Application
users	O
,	O
an	O
email	O
will	O
have	O
options	O
for	O
"	O
Yes	O
"	O
,	O
"	O
No	O
"	O
,	O
or	O
"	O
Maybe	O
"	O
.	O
</s>
<s>
Privacy	O
settings	O
allow	O
the	O
user	O
to	O
define	O
the	O
levels	O
of	O
public	O
visibility	O
of	O
the	O
entire	O
calendar	B-Application
or	O
individual	O
events	O
.	O
</s>
<s>
Although	O
the	O
calendar	B-Application
defaults	O
to	O
showing	O
users	O
event	O
times	O
in	O
their	O
local	O
time	O
,	O
users	O
can	O
specify	O
a	O
different	O
time	O
zone	O
for	O
an	O
event	O
.	O
</s>
<s>
Users	O
can	O
enable	O
or	O
disable	O
the	O
visibility	O
of	O
special	O
calendars	B-Application
,	O
including	O
a	O
Birthdays	O
calendar	B-Application
,	O
that	O
automatically	O
retrieves	O
dates	O
of	O
births	O
from	O
a	O
user	O
's	O
Google	B-Application
contacts	O
and	O
displays	O
the	O
dates	O
on	O
a	O
yearly	O
basis	O
,	O
and	O
a	O
Holidays	O
calendar	B-Application
,	O
a	O
country-specific	O
calendar	B-Application
featuring	O
dates	O
of	O
special	O
occasions	O
.	O
</s>
<s>
The	O
user	O
interface	O
of	O
Google	B-Application
Calendar	I-Application
was	O
originally	O
designed	O
by	O
Kevin	O
Fox	O
.	O
</s>
<s>
Google	B-Application
Calendar	I-Application
allows	O
the	O
user	O
to	O
import	O
events	O
from	O
a	O
different	O
calendar	B-Application
application	I-Application
,	O
with	O
notable	O
support	O
for	O
both	O
Microsoft	O
Outlook	O
and	O
Apple	B-Application
iCloud	I-Application
calendars	B-Application
.	O
</s>
<s>
In	O
December	O
2010	O
,	O
Google	B-Application
added	O
the	O
ability	O
for	O
users	O
to	O
select	O
a	O
time	O
zone	O
for	O
an	O
event	O
,	O
a	O
notable	O
feature	O
that	O
was	O
previously	O
missing	O
;	O
the	O
feature	O
's	O
absence	O
was	O
criticized	O
in	O
the	O
media	O
.	O
</s>
<s>
In	O
August	O
2015	O
,	O
Google	B-Application
added	O
an	O
"	O
Events	O
from	O
Gmail	B-Application
"	O
feature	O
,	O
where	O
event	O
information	O
from	O
a	O
user	O
's	O
Gmail	B-Application
messages	O
are	O
automatically	O
added	O
to	O
Google	B-Application
Calendar	I-Application
.	O
</s>
<s>
In	O
December	O
2015	O
,	O
Google	B-Application
added	O
a	O
"	O
Reminders	O
"	O
feature	O
,	O
enabling	O
users	O
to	O
add	O
to-do	O
activities	O
as	O
Reminders	O
,	O
with	O
those	O
activities	O
being	O
displayed	O
in	O
the	O
calendar	B-Application
alongside	O
regular	O
events	O
.	O
</s>
<s>
Google	B-Application
also	O
states	O
that	O
Reminders	O
can	O
automatically	O
add	O
additional	O
,	O
helpful	O
information	O
to	O
Reminders	O
based	O
on	O
known	O
details	O
,	O
such	O
as	O
numbers	O
or	O
addresses	O
.	O
</s>
<s>
Reminders	O
serves	O
as	O
a	O
cross-service	O
feature	O
,	O
meaning	O
Reminders	O
also	O
show	O
up	O
in	O
Inbox	B-Protocol
by	I-Protocol
Gmail	I-Protocol
,	O
Google	B-Application
Now	I-Application
,	O
and	O
Google	B-Application
Keep	I-Application
.	O
</s>
<s>
In	O
January	O
2016	O
,	O
Google	B-Application
added	O
"	O
Smart	O
Suggestions	O
"	O
to	O
Google	B-Application
Calendar	I-Application
on	O
their	O
mobile	B-Application
apps	I-Application
.	O
</s>
<s>
At	O
the	O
same	O
time	O
as	O
Smart	O
Suggestions	O
,	O
Google	B-Application
also	O
added	O
holiday	O
calendars	B-Application
for	O
54	O
new	O
countries	O
,	O
adding	O
up	O
to	O
a	O
total	O
of	O
143	O
country-specific	O
holiday	O
calendars	B-Application
.	O
</s>
<s>
In	O
April	O
2016	O
,	O
Google	B-Application
added	O
a	O
"	O
Goals	O
"	O
feature	O
.	O
</s>
<s>
"	O
,	O
Google	B-Application
Calendar	I-Application
will	O
automatically	O
"	O
find	O
the	O
best	O
windows	O
to	O
pencil	O
in	O
time	O
for	O
that	O
goal	O
"	O
,	O
with	O
the	O
calendar	B-Application
adapting	O
to	O
the	O
user	O
's	O
schedule	O
over	O
time	O
,	O
such	O
as	O
rescheduling	O
a	O
goal	O
activity	O
if	O
an	O
event	O
is	O
added	O
that	O
causes	O
a	O
direct	O
conflict	O
with	O
the	O
time	O
of	O
the	O
goal	O
.	O
</s>
<s>
The	O
feature	O
was	O
expanded	O
in	O
January	O
2017	O
with	O
support	O
for	O
Google	B-Device
Fit	I-Device
and	O
Apple	B-Application
Health	I-Application
,	O
to	O
see	O
the	O
progress	O
made	O
towards	O
completing	O
a	O
goal	O
.	O
</s>
<s>
In	O
March	O
2017	O
,	O
the	O
iOS	B-Application
app	O
was	O
updated	O
to	O
feature	O
support	O
for	O
the	O
iPad	B-Device
,	O
and	O
it	O
was	O
again	O
updated	O
in	O
July	O
to	O
add	O
a	O
widget	B-Application
in	O
the	O
iOS	B-Application
"	O
Today	O
"	O
panel	O
.	O
</s>
<s>
In	O
June	O
2017	O
,	O
following	O
May	O
's	O
announcement	O
of	O
Google	B-Application
's	I-Application
new	O
Family	O
Groups	O
feature	O
across	O
several	O
of	O
its	O
services	O
,	O
Google	B-Application
began	O
rolling	O
out	O
"	O
family	O
calendars	B-Application
"	O
for	O
users	O
in	O
Google	B-Application
Calendar	I-Application
.	O
</s>
<s>
The	O
feature	O
lets	O
family	O
members	O
create	O
shared	O
events	O
visible	O
in	O
a	O
"	O
Family	O
"	O
calendar	B-Application
option	O
.	O
</s>
<s>
For	O
users	O
of	O
Google	B-Application
Workspace	O
(	O
formerly	O
G	O
Suite	O
)	O
,	O
a	O
subscription	O
service	O
for	O
business	O
,	O
education	O
and	O
government	O
customers	O
that	O
offers	O
premium	O
functionality	O
,	O
Google	B-Application
Calendar	I-Application
has	O
a	O
"	O
Find	O
a	O
time	O
"	O
feature	O
that	O
can	O
suggest	O
the	O
best	O
time	O
for	O
an	O
event	O
with	O
a	O
group	O
of	O
people	O
,	O
based	O
on	O
available	O
times	O
for	O
each	O
individual	O
in	O
the	O
group	O
.	O
</s>
<s>
Google	B-Application
Calendar	I-Application
entered	O
a	O
limited	O
beta	O
release	O
on	O
April	O
13	O
,	O
2006	O
,	O
and	O
exited	O
the	O
beta	O
stage	O
in	O
July	O
2009	O
.	O
</s>
<s>
Initially	O
only	O
available	O
on	O
the	O
web	B-Application
and	O
on	O
the	O
Android	B-Application
operating	I-Application
system	I-Application
,	O
an	O
iOS	B-Application
app	O
was	O
released	O
on	O
March	O
10	O
,	O
2015	O
.	O
</s>
<s>
In	O
a	O
March	O
2015	O
review	O
of	O
the	O
Android	B-Application
app	O
,	O
Sarah	O
Mitroff	O
of	O
CNET	O
wrote	O
that	O
the	O
new	O
Material	O
Design-inspired	O
app	O
was	O
"	O
cleaner	O
"	O
,	O
with	O
"	O
fewer	O
distractions	O
and	O
colorful	O
graphics	O
that	O
add	O
a	O
lot	O
of	O
personality	O
to	O
an	O
otherwise	O
dull	O
app	O
"	O
.	O
</s>
<s>
She	O
complimented	O
the	O
integration	O
between	O
Google	B-Application
Calendar	I-Application
and	O
Gmail	B-Application
,	O
writing	O
that	O
"	O
All	O
of	O
the	O
relevant	O
details	O
are	O
there	O
,	O
including	O
confirmation	O
numbers	O
,	O
links	O
to	O
the	O
source	O
email	O
,	O
even	O
gate	O
assignments	O
for	O
flights	O
"	O
,	O
and	O
called	O
it	O
"	O
one	O
of	O
my	O
favorite	O
parts	O
of	O
the	O
app	O
"	O
,	O
but	O
also	O
noted	O
that	O
the	O
feature	O
could	O
be	O
turned	O
off	O
.	O
</s>
<s>
Overall	O
,	O
she	O
wrote	O
that	O
Google	B-Application
Calendar	I-Application
"	O
is	O
a	O
reliable	O
,	O
simple	O
and	O
playful	O
alternative	O
to	O
your	O
device	O
's	O
built-in	O
calendar	B-Application
"	O
and	O
that	O
it	O
is	O
"	O
efficient	O
and	O
a	O
breeze	O
to	O
use	O
"	O
.	O
</s>
<s>
She	O
wrote	O
that	O
"	O
The	O
first	O
thing	O
you	O
notice	O
about	O
Google	B-Application
Calendar	I-Application
is	O
the	O
bold	O
interface	O
"	O
,	O
adding	O
that	O
"	O
Google	B-Application
automatically	O
detects	O
certain	O
event	O
types	O
and	O
puts	O
graphics	O
behind	O
them	O
,	O
which	O
is	O
a	O
nice	O
touch	O
"	O
.	O
</s>
<s>
It	O
's	O
not	O
a	O
huge	O
peeve	O
,	O
but	O
for	O
anyone	O
who	O
has	O
a	O
busy	O
calendar	B-Application
,	O
it	O
could	O
result	O
in	O
a	O
lot	O
of	O
scrolling	O
"	O
.	O
</s>
<s>
She	O
also	O
criticized	O
the	O
Smart	O
Suggestions	O
,	O
writing	O
that	O
"	O
in	O
my	O
short	O
time	O
using	O
Google	B-Application
Calendar	I-Application
,	O
the	O
natural	O
language	O
support	O
leaves	O
a	O
lot	O
to	O
be	O
desired	O
.	O
</s>
<s>
I	O
had	O
trouble	O
typing	O
times	O
or	O
days	O
and	O
getting	O
Google	B-Application
to	O
understand	O
it	O
"	O
.	O
</s>
<s>
Kazmucha	O
also	O
criticized	O
the	O
then-lack	O
of	O
a	O
widget	B-Application
in	O
the	O
Notification	O
Center	O
,	O
but	O
wrote	O
conclusively	O
that	O
"	O
Google	B-Application
Calendar	I-Application
is	O
off	O
to	O
a	O
good	O
start	O
but	O
it	O
is	O
n't	O
making	O
me	O
switch	O
away	O
from	O
[	O
current	O
calendar	B-Application
app ]	O
.	O
"	O
</s>
<s>
Derek	O
Walter	O
of	O
Macworld	O
,	O
however	O
,	O
praised	O
the	O
iPhone	O
app	O
,	O
writing	O
that	O
"	O
It	O
’s	O
a	O
gorgeous	O
calendar	B-Application
app	O
that	O
mines	O
your	O
Gmail	B-Application
account	O
to	O
automatically	O
add	O
events	O
"	O
,	O
with	O
"	O
a	O
splash	O
of	O
color	O
and	O
graphics	O
for	O
effect	O
"	O
.	O
</s>
<s>
Walter	O
also	O
criticized	O
the	O
then-lack	O
of	O
a	O
widget	B-Application
in	O
the	O
Notification	O
Center	O
,	O
as	O
well	O
as	O
the	O
then-lack	O
of	O
iPad	B-Device
support	O
.	O
</s>
<s>
Walter	O
called	O
the	O
Material	B-Application
Design	I-Application
"	O
rather	O
elegant	O
and	O
polished	O
,	O
with	O
a	O
focus	O
on	O
parceling	O
off	O
information	O
for	O
easy	O
viewing	O
,	O
registering	O
touches	O
with	O
a	O
subtle	O
splash	O
on	O
the	O
screen	O
,	O
and	O
using	O
a	O
lot	O
of	O
visuals	O
cues	O
"	O
,	O
but	O
noted	O
that	O
"	O
it	O
’s	O
not	O
for	O
everyone	O
,	O
especially	O
if	O
you	O
prefer	O
Apple	O
’s	O
design	O
overhaul	O
first	O
introduced	O
in	O
iOS	B-Operating_System
7	I-Operating_System
.	O
</s>
<s>
You	O
’ll	O
also	O
find	O
that	O
some	O
elements	O
of	O
Material	B-Application
Design	I-Application
do	O
n’t	O
translate	O
well	O
to	O
the	O
iPhone	O
,	O
such	O
as	O
the	O
loss	O
of	O
the	O
slide	O
gesture	O
to	O
go	O
back	O
"	O
.	O
</s>
