"Fri, 23 Jan 1970 01:01:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
01:01:42
General datetime
1970-01-23 01:01:42Z
For Database
1970-01-23 01:01:42
For HTTP1.1
Fri, 23 Jan 1970 01:01:42 GMT