"Tue, 06 Jan 1970 07:47:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
07:47:42
General datetime
1970-01-06 07:47:42Z
For Database
1970-01-06 07:47:42
For HTTP1.1
Tue, 06 Jan 1970 07:47:42 GMT