"Wed, 18 Mar 1970 00:52:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700318
Only TIME
00:52:51
General datetime
1970-03-18 00:52:51Z
For Database
1970-03-18 00:52:51
For HTTP1.1
Wed, 18 Mar 1970 00:52:51 GMT