"Mon, 19 Jan 1970 00:03:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
00:03:15
General datetime
1970-01-19 00:03:15Z
For Database
1970-01-19 00:03:15
For HTTP1.1
Mon, 19 Jan 1970 00:03:15 GMT