"Mon, 12 Jan 1970 21:48:26"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
21:48:26
General datetime
1970-01-12 21:48:26Z
For Database
1970-01-12 21:48:26
For HTTP1.1
Mon, 12 Jan 1970 21:48:26 GMT