One year: Ask a student who has failed a final exam.
One month: Ask a mother who has given birth to a premature baby.
One week: Ask an editor of a weekly newspaper.
One hour: Ask the lovers who are waiting to meet.
One minute: Ask the person who has missed the train, bus or plane.
One second: Ask a person who has survived an accident
One millisecond: Ask the person who has won a silver medal in the Olympics.
Yesterday is history…
Tomorrow a mystery...
Today is a gift.
That is why it is called the Present.
Treasure every moment that you have!
(This is one of the famous quotes on value of time. I am just re-quoting this quote by someone Anonymous)