"Mon, 12 Jan 1970 12:31:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
12:31:35
General datetime
1970-01-12 12:31:35Z
For Database
1970-01-12 12:31:35
For HTTP1.1
Mon, 12 Jan 1970 12:31:35 GMT