"Mon, 05 Jan 1970 21:12:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
21:12:53
General datetime
1970-01-05 21:12:53Z
For Database
1970-01-05 21:12:53
For HTTP1.1
Mon, 05 Jan 1970 21:12:53 GMT