"Thu, 19 Feb 1970 00:52:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700219
Only TIME
00:52:11
General datetime
1970-02-19 00:52:11Z
For Database
1970-02-19 00:52:11
For HTTP1.1
Thu, 19 Feb 1970 00:52:11 GMT