What is epoch time?
The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z). Literally speaking the epoch is Unix time 0 (midnight 1/1/1970), but ‘epoch’ is often used as a synonym for ‘Unix time’. Many Unix systems store epoch dates as a signed 32-bit integer, which might cause problems on January 19, 2038 (known as the Year 2038 problem or Y2038).
|Human readable time||Seconds|
|1 hour||3600 seconds|
|1 day||86400 seconds|
|1 week||604800 seconds|
|1 month (30.44 days)||2629743 seconds|
|1 year (365.24 days)||31556926 seconds|
I use this most of the time to convert it http://www.epochconverter.com/