When can we add 2 to 11 and get 1 as the correct answer?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

What has a ring but no finger?

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Can you guess the name of the month by looking the below rebus ?