"Fri, 16 Jan 1970 00:56:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
00:56:15
General datetime
1970-01-16 00:56:15Z
For Database
1970-01-16 00:56:15
For HTTP1.1
Fri, 16 Jan 1970 00:56:15 GMT