It’s About Clock Time

When we talk about clock time and time zones,
one question arises in our mind what the time is?
It is the major question and, that’s a question as antique as time.

But yeah, essentially time is like, only a social construct.
Physicists are still debating on whether or not or not time exists within the universe.

This quickly receives us into the territory of asking ourselves,
without a doubt, bizarre things that hurt our brain, like what’s time, or what’s physics.

So to keep away from all of this, I’m simply going to say that NO, time doesn’t exist.

Okay, you’re no longer getting out of this that easy.
But I think it’s far good to check the records of time so we can come to know
why it’s so goddamn hard to do things with timestamps.

What Time Is It?

Most of the time we ask this question for our inner satisfaction,
for example, if we are doing our work with our clients from different countries,
so we mostly want to know the answer to this important question.

But this is not the complete question bit of the part is hidden in this question i.e.

What Time Is It Here?

Once we started traveling, getting planes and trains and automobiles,
we had movement, we had transportation, and we might be in two foreign places within hours.
So we started out asking this question.

What Time Is It There?

This query ruined the entirety.

Now we needed to deal no longer simply with one time here, no longer time’s right here and there,
but a large number of times, all interacting with every other everywhere.
This complicated the whole lot and made obvious the notion that writing time zone code
was some of the worst things you need to do in our field.
To avoid this type of scenario, we prefer time zones.

Why We Need Time Zones

You in all likelihood have heard of time zones;
however, do you realize why we’ve them?
To higher understand this question,
it allows us to recall some key standards from elementary college science class.

We, of course, stay at the Earth, and the Earth spins on an axis.
Every 24 hours, the Earth makes a whole rotation, and we call this a day.

The Sun shines a mild on the Earth. As Earth spins, a few components of the Earth acquire sunlight,
even as others are dark. This offers us night time and day.

From your place on Earth, you notice the Sunrise while Earth rotates into the sunlight.
Let’s suppose if we have an only one-time zone on Earth.
At noon, it would be first-class and sunny in which you live.

 But in another part of the arena, it might be completely darkish at the same time.
These differences are on the coronary heart of why we’ve got time zones.

 Before clocks had been invented, human beings kept time using diverse methods.
Among the earliest measuring gadgets were sundials,
which informed time-based totally of the Sun’s position within the sky.

Cities and towns all through the arena would finally establish their local times,
and this machine labored for a while.
Before the 19th century, human beings didn’t generally tend to tour that far.
And for those that did, long-travel instances and absence of long-distance verbal exchange made time differences barely noticeable.

Types Of Time Zones

There are two main types of time zone:

  • Greenwich Mean Time (GMT).
  • Coordinated Universal Time (UTC).


Mean solar time on the village of Greenwich close to London,
which, as decided at the International Meridian Congress of 1884,
is assigned zero tiers longitude (called Prime Meridian).

Because its miles based totally at the Earth’s rotation (that is irregular), it simply follows a fictitious.
Mean Sun that moves at a uniform speed along the equator.

 A 19th-century international time standard, it changed into replaced in 1970 through the
Coordinated Universal Time (UTC) for astronomical and navigational use but remains in commonplace
use by airlines and radio and television stations.
When expressed in terms of a 24-hour clock, GMT is also known as standard time (UT or Z).

Difference B/W GMT AND UTC

There is a major difference between GMT & UTC listed below:

Often used interchangeably, UTC and GMT (Greenwich Mean Time) are barely different.  
UTC is a worldwide time preferred.

UTC is also primarily based at the Prime Meridian, which causes some to equate UTC with GMT.
However, more than a nearby time region, UTC is the usual for coordinating time worldwide,
simply because the Prime Meridian is usual for east/west longitude.

It is crucial to keep in mind:
UTC is an established time preferred and no longer a local time zone.
UTC is notably extra unique and specific than GMT.
For example, UTC is continually a 24-hour expression.

UTC also money owed for sub-2d corrections, that’s why it is implemented as
the worldwide time general for computer-primarily based systems.
Most of all timekeeping gadgets use the UTC 24-hour time fashionable primarily
based on highly precise atomic clocks.

 The complete time frame of the day hours, minutes, and seconds that UTC shows are kept close to the mean solar time at the Earth’s Prime Meridian.

GMT is a neighborhood time quarter. Based on the Prime Meridian,
GMT was installed as a local time area at Greenwich, United Kingdom,
in 1886 (long before computers and international time standards have been concepts).

GMT is expressed at 12-hour A.M. Or P.M.). GMT is UTC (+/- 0). Said any other way, the local GMT quarter is the UTC widespread with 0 offsets.



Greenwich Mean Time and Coordinated Universal Time are two essential time zone.
There is no hard and fast rule for people to use only one;
they may use any of the time zones according to their location and mindset.

Main Cities World Wide Current Time

UTC:  -7 Hours

UTC:  -4 Hours

UTC:  +1 Hours

UTC:  +2 Hours

UTC:  +3 Hours

UTC:  +5.5 Hours

UTC: +8 Hours

UTC:  +9 Hours