"Wed, 07 Jan 1970 00:57:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
00:57:13
General datetime
1970-01-07 00:57:13Z
For Database
1970-01-07 00:57:13
For HTTP1.1
Wed, 07 Jan 1970 00:57:13 GMT