"Fri, 16 Jan 1970 14:56:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
14:56:49
General datetime
1970-01-16 14:56:49Z
For Database
1970-01-16 14:56:49
For HTTP1.1
Fri, 16 Jan 1970 14:56:49 GMT