"Fri, 09 Jan 1970 19:42:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
19:42:00
General datetime
1970-01-09 19:42:00Z
For Database
1970-01-09 19:42:00
For HTTP1.1
Fri, 09 Jan 1970 19:42:00 GMT