"Fri, 09 Jan 1970 07:55:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
07:55:40
General datetime
1970-01-09 07:55:40Z
For Database
1970-01-09 07:55:40
For HTTP1.1
Fri, 09 Jan 1970 07:55:40 GMT