"Sat, 07 Feb 1970 18:12:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
18:12:53
General datetime
1970-02-07 18:12:53Z
For Database
1970-02-07 18:12:53
For HTTP1.1
Sat, 07 Feb 1970 18:12:53 GMT