PHP Date() Function



http://www.w3schools.com/php/php_date.asp

date(format,timestamp)
d - Represents the day of the month (01 to 31)
m - Represents a month (01 to 12)
Y - Represents a year (in four digits)



PHP Date() - Adding a Timestamp


The optional timestamp parameter in the date() function specifies a timestamp. If you do not specify a timestamp, the current date and time will be used.

The mktime() function returns the Unix timestamp for a date.

The Unix timestamp contains the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified.

mktime(hour,minute,second,month,day,year,is_dst)