"Fri, 16 Jan 1970 14:42:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
14:42:57
General datetime
1970-01-16 14:42:57Z
For Database
1970-01-16 14:42:57
For HTTP1.1
Fri, 16 Jan 1970 14:42:57 GMT