"Sat, 07 Feb 1970 01:01:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
01:01:15
General datetime
1970-02-07 01:01:15Z
For Database
1970-02-07 01:01:15
For HTTP1.1
Sat, 07 Feb 1970 01:01:15 GMT