(bÄt) n. 1. An agreement usually between two parties that the one who has made an incorrect prediction about an uncertain outcome will forfeit something stipulated to the other; a wager: made a bet that it would stop raining before 2:00. 2. An amount or object risked in a wager; a stake: a bet of $50.
1 billion seconds is a significant birthday or anniversary, being about 4 months shy of 32 years. 1 billion seconds is 31 years, 251 days, 13 hours, 34 minutes, 54.7843 seconds. But note that these are 365-day years, so you have to adjust for leap years. Remember, a leap year adds 1 day at the end of February on years that are divisible by 4, unless they're also divisble by 100, except when it's also divisible by 400.
nanosecond = 1 billionth of a second = 1 billion nanoseconds in 1 second year = 365/366 (leap year) days day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds = 60 billion nanoseconds so: 60 x 60 = 3600 seconds in hour 24 x 3600 = 86,400 seconds in day 86,400 x 365/366 = 31,536,000/31,622,400 seconds in a year 31,536,000/31,622,400 x 1,000, ...