"Mon, 23 Feb 1970 00:52:10"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700223
Only TIME
00:52:10
General datetime
1970-02-23 00:52:10Z
For Database
1970-02-23 00:52:10
For HTTP1.1
Mon, 23 Feb 1970 00:52:10 GMT