Universal Time

There are 71 Catur yuga, Dvipa yuga or Maha yugas in a Manvantara (1 life span of Manu) and 14 Manvantara in a day of Brahma

71 Catur-yugas or Maha-yugas = 1 Manvantara (1 life span of Manu)

There are two Kalpas in a day and night (Adhi Sandhi) of Brahma.

A Manvantara consists of 71 Catur yuga, Dvipa yuga or Maha yuga, (306,720,000 human years.

Each Manvantara is ruled by a Manu.

14 Manvantaras = 1 kalpa for Brahma's 12 hour day-time and I kalpa for Brahma's 12 hour night.

There are 2 kalpas in a 24 hour day-night of Brahma

So we have already passed through the previous 6 Manvantaras in Brahma's day.

There are 1,000 cycles of Mahā-Yuga in one 12 hour day-time of Brahma and no Maha-yugas during Brahma's 12 hour night-time.

But still there is one Kalpa for his 12 hour day and one kalpa for his 12 hour night

So there are 2 Kalpas in Brahma's 24 hour day-night period known as a full day

One cycle of four Yugas is one Mahā-Yuga (4 million 320 thousand human years)

As confirmed by the Bhagavad Gītā Śloka 8.17

"sahasra-yuga-paryantam ahar yad brahmaṇo viduḥ rātriṁ yuga-sahasrāntāṁ te 'ho-rātra-vido janāḥ",

A 12 hour day of Brahma is of 1000 Mahā-Yuga. Thus a 12 hour day-time of Brahma is one Kalpa with a duration of 4 Billion 320 Million human years.

Two Kalpas constitute a day and night - (Adhi Sandhi) of Brahma.

A Manvantara consists of 71 Mahā-Yuga (306,720,000 human years).

Each Manvantara is ruled by a Manu.

After each Manvantara follows one Saṃdhi Kāla of the same duration as a Kṛta Yuga (1,728,000 = 4 Charaṇas).

It is said that during a Saṃdhi Kāla, the entire earth is submerged in water.

A Kalpa (12 hour day or a 12 hour night) each consists of a period of 4 Billion 320 Million human years followed by 14 Manvataras and Saṃdhi Kalas.

A full 24 hour day-night period of Brahma has two Kalpas and lasts for 8 Billion 640 million human years.

A day of Brahma equals 14 times 71 Mahā-Yuga, Catur yuga or Dvipa yuga) + (15 × 4 Charaṇas) = 994 Mahā-Yuga, Catur yuga or Dvipa yuga + (15 * 4,800) = 994 Mahā-Yuga,Catur yuga or Dvipa yuga + (72,000 years) [deva years] 6 = 12,000 [deva years] viz. one Maha yuga, Catur yuga or Dvipa yuga.

This equals 994 Mahā-Yuga, Catur yuga or Dvipa yuga then add another 6 Mahā-Yuga, Catur yuga or Dvipa yuga that gives the 1,000 Mahā-Yugas, Catur yuga or Dvipa yuga that exist during Brahma's 12 hour day-time.

Remember there are no Maha-yugas, Catur yuga or Dvipa yuga during Brahma's 12 hour night while Brahma is inactive due to sleeping. It is also during this 12 hour night-time of Brahma lasting 4 Billion 320 Million human years a partial annihilation of this universe takes place.

Currently, 50 years (155 Trillion 520 Billion human years) of Brahma have elapsed.

The last Kalpa at the end of 50th year is called Padma Kalpa.

We are currently in the first 'day' of the 51st year. (January 1st in human calculations)

Brahma's first 'day-time' of the 51st year Kalpa, is named as Shveta-Varaha Kalpa.

Within this day, six Manvantaras have already elapsed and this is the seventh Manvantara, named as Vaivasvatha Manvantara (or Sraddhadeva Manvantara).

Within the Vaivasvatha Manvantara, 27 Maha-yugas (remember, 4 Yugas together is a Mahayuga), and the Krita or Satya, Treta and Dwapara Yugas of the 28th Maha-yuga have elapsed.

This Kali-yuga is in the 28th Mahayuga.

This Kali-yuga began in the year 3102 BCE in the proleptic Julian Calendar.

Since 50 years or 155 Trillion 520 Billion human years of Brahma have already elapsed, this is the second Parardha, also called as Dvithiya Parardha.

We are in the 460th Maha-yuga during Brahma's day-time making it about 11.40 am during Brahma's first day-time in his 51st year.

Remember, there are 1000 Maha-yugas in Brahma's 12 hour day-time while non exist during his 12 hour night-time while he sleeps

A Catur yuga, Dvipa yuga and Maha yuga - ''A cycle of 4 Yugas''.

The Catur-yuga is also known as Divya-yuga or Maha-yuga and is made up of the four yugas -

''Satya-yuga, Treta-yuga, Dvapara-yuga, Kali-yuga''.

There are 1000 Catur-yuga, Divya-yuga or Maha-yugas in the 12 hour day-time of Lord Brahma (that takes 4 billion 320 million human years)

While there are no Catur-yugas, Divya-yuga or Maha-yugas in Brahma's 12 hour night-time (that also takes 4 billion 320 million human years) while Brahma sleeps as a partial annihilation takes place.

However, it is said both Lord Krishna in His original form and Lord Caitanya only come ''once'' in a day of Brahma, that ''day'' really means a ''day and night 24 hour period of Brahma'' that together over 24 hours takes 8 billion 640 million human years.

Presently ''our Kali-yuga'' where Lord Caitanya also came is happening in the very early morning of Brahma's ''day-time'' 11.40 am January 1st in Brahma's 51st

We are presently nearly half way into Brahma's 12 hour day-time which is the late morning being in the 460th Maha-yuga, Divya-yuga or Chatur-yuga out of a 1000.

Brahma's full day-time period of 12 hours takes 4 billion 320 million human years to happen.

Then night-time comes which is also 4 billion 320 million human years long.

A full 24 hour day is 8 Billion 640 Million human years

At night while Brahma sleeps and creates no Chatur-yuga, Divya-yuga Maha-yugas, our Universe is partially annihilated.

When the next day-time arrives at sunrise the cycle repeats itself for every day and night of Brahma's life

We are in the 28th Chatur-yugas, Divya-yuga or Maha-yuga in the ''Vaivasvata Manu'' (current) that has 71 Maha-yugas in it.

71 Chatur-yugas = 1 Manvantara (1 life span of Manu)

14 Manvantaras = 1 kalpa (1 day-time of Brahma)

We are in the 460th or 454th Maha-yuga also known as a Chatur-yuga or Divya-yuga

1 Svayambhuva Manu

2 Svarocisha Manu Vibhu

3 Uttama Manu Satyasena

4 Tapasa Manu Hari

5 Raivata Manu Vaikuntha

6 Cakshusha Manu Ajita

7 Vaivasvata Manu (current) Vamana

8 Savarni Manu Sarvabhauma

9 Daksha-savarni Manu Rishabha

10 Brahma-savarni Manu Vishvaksena

11 Dharma-savarni Manu Dharmasetu

12 Rudra-savarni Manu Sudama

13 Deva-savarni Manu Yogesvara

14 Indra-savarni Manu Brihadbhanu

There are 2 Kalpas in Brahma's full day of 24 hours not 1 as some believe

1 kalpa for his 12 hour day

1 kalpa for his 12 hour night

2 kalpas for a 24 hour day-night full day

Just a reminder, A Catur yuga, Dvipa yuga and Maha yuga - is made up of a cycle of 4 Yugas, Satya-yuga, Treta-yuga, Dvapara-yuga, Kali-yuga.

There are 1000 Catur-yuga, Divya-yuga or Maha-yugas in the 12 hour day-time of Lord Brahma (that takes 4 billion 320 million human years)

NOTE - there are no Maha-yugas, Catur-yuga or Divya-yuga in Brahma's 12 hour night-time (that also takes 4 billion 320 million human years) while Brahma sleeps as a partial annihilation takes place.

At night while Brahma sleeps no Chatur-yuga, Divya-yuga or Maha-yugas are created. This is because Brahma is sleeping and as he sleeps a partially annihilation of this Universe goes on for 4 billion 320 million (12 hours in Brahma's night-time period)

When the next day-time arrives at sunrise the cycle repeats itself for every ''day and night'' of Brahma's life

Lord Krishna in His original form and Lord Caitanya only come ''once'' in a day of Brahma, that ''day'' really means a ''day and night 24 hour period of Brahma'' that together over 24 hours takes 8 billion 640 million human years.

Lord Krishna in His original form and Lord Caitanya only come ''once' every 8 billion 640 million human years.

Taken from: https://www.facebook.com/VedicCosmology/posts/1731374690503789:0