"Fri, 16 Jan 1970 18:14:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700116
Only TIME
18:14:39
General datetime
1970-01-16 18:14:39Z
For Database
1970-01-16 18:14:39
For HTTP1.1
Fri, 16 Jan 1970 18:14:39 GMT