"Mon, 05 Jan 1970 07:51:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
07:51:56
General datetime
1970-01-05 07:51:56Z
For Database
1970-01-05 07:51:56
For HTTP1.1
Mon, 05 Jan 1970 07:51:56 GMT