"Mon, 16 Feb 1970 00:52:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700216
Only TIME
00:52:50
General datetime
1970-02-16 00:52:50Z
For Database
1970-02-16 00:52:50
For HTTP1.1
Mon, 16 Feb 1970 00:52:50 GMT