"Thu, 15 Jan 1970 00:56:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
00:56:13
General datetime
1970-01-15 00:56:13Z
For Database
1970-01-15 00:56:13
For HTTP1.1
Thu, 15 Jan 1970 00:56:13 GMT