"Mon, 19 Jan 1970 04:42:58"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
04:42:58
General datetime
1970-01-19 04:42:58Z
For Database
1970-01-19 04:42:58
For HTTP1.1
Mon, 19 Jan 1970 04:42:58 GMT