"Sat, 07 Feb 1970 11:25:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
11:25:47
General datetime
1970-02-07 11:25:47Z
For Database
1970-02-07 11:25:47
For HTTP1.1
Sat, 07 Feb 1970 11:25:47 GMT