"Mon, 12 Jan 1970 12:36:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
12:36:42
General datetime
1970-01-12 12:36:42Z
For Database
1970-01-12 12:36:42
For HTTP1.1
Mon, 12 Jan 1970 12:36:42 GMT