"Sun, 08 Feb 1970 15:13:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700208
Only TIME
15:13:05
General datetime
1970-02-08 15:13:05Z
For Database
1970-02-08 15:13:05
For HTTP1.1
Sun, 08 Feb 1970 15:13:05 GMT