"Mon, 05 Jan 1970 20:42:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
20:42:53
General datetime
1970-01-05 20:42:53Z
For Database
1970-01-05 20:42:53
For HTTP1.1
Mon, 05 Jan 1970 20:42:53 GMT