"Mon, 25 May 1970 07:11:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700525
Only TIME
07:11:49
General datetime
1970-05-25 07:11:49Z
For Database
1970-05-25 07:11:49
For HTTP1.1
Mon, 25 May 1970 07:11:49 GMT