"Sat, 07 Feb 1970 00:03:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
00:03:09
General datetime
1970-02-07 00:03:09Z
For Database
1970-02-07 00:03:09
For HTTP1.1
Sat, 07 Feb 1970 00:03:09 GMT