Do you know , if you are 31 years old , you have crossed 1 billionth seconds in this world.
Yes i billion seconds.
Use calculator and count how many seconds you lived.

1 day = 86400 (60*60*24) seconds. so 31 years is equal to 31*365*86400 = 977616000. Oops near to 1 billion but we forget to count leap year (7 or 8 days = 86400*7= 604800 ) and intrauterine life 9 months (86400 seconds * 275 days = 23760000 seconds)
So total 1001980800 seconds after sum up all.
🙂