"Fri, 09 Jan 1970 12:38:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
12:38:13
General datetime
1970-01-09 12:38:13Z
For Database
1970-01-09 12:38:13
For HTTP1.1
Fri, 09 Jan 1970 12:38:13 GMT