Epoch – Pronounced as EH-puhk, it is a Greek word, which means "fixed point in time. Epoch is the date and time calculated relative to your computer's clock and timestamp. It is represented as (00:00:00).
Date Interval with Epoch Timestamp in PHP:
To calculate date interval using epoch timestamp in php, we take a variable birthday and assign a value to that variable.We will take one more variable gestation that will perform 36 week days calculation.
$birthday = 163727100;
$gestation = 36 * 7 * 86400; // 36 weeks
$whoopee_made = $birthday - $gestation;
Above is the simple code to calculate date interval using epoch timestamp in PHP.
This simple article tells that how we can calculate date in epoch timestamp in PHP.
Calculate date interval with epoch timestamps in PHP