How Brahma the Creator designed Age of Universe & Life Cycles

Creator of this Universe Brahma dev lives a very long long life. From Brahma's Perspective our lives are very very very very short. Brahma's 1 Kalpa (daytime = 12 hours) is ours 4.32 billion years & his night also the same. That means His whole day (24 hours) constitute ours 8.64 billion years. His 30 days or 1 month is ours 259.2 billion years. His 12 months or 1 year is ours 3.1104 trillion years. 50 years of Brahmaa = 1 Paraardha. 2 Paraardhas = 100 years of Brahmaa (the lifespan of Brahmaa) is ours 311.04 trillion years. Brahmaa in his day (daytime) creates 14 Manus. Lifespan of a Manu is called a Manvantara. 1 Manvantara (306.72 million years has 71 Chaturyugas or Divyayugas. 1 Chaturyuga or Divyayuga (4.32 million years) has 4 yugas and they are:- 

(1) Satyayuga = 1,728,000 years

(2) Dwaaparayuga = 1,296,000 years

(3) Tretaayuga = 864,000 years

Kaliyuga = 432,000 years

So, we are in Brahmaa's 51st year, out of 14 Manus we are in 7th Manu's reign named Vaivasvata Manu, out of 71 Chaturyugas or Divyayugas we are in 28th Chaturyuga, out of 4 yugas we are in Kaliyuga and out of three phases of period viz. early, mid & late we are in early period of "Kaliyuga". Out of 432,000 years 5,118 years have already passed and remaining 426,882 years are yet to be passed. 

So, everything destroyed in Kaliyuga means all evil persons, demoniac persons will be killed by Lord Kalki, this is doesn't mean that entire Universe will be destroyed. There is still much delay in the destruction of the Universe. ~ 155 trillion years!