"Sun, 15 Feb 1970 07:11:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700215
Only TIME
07:11:30
General datetime
1970-02-15 07:11:30Z
For Database
1970-02-15 07:11:30
For HTTP1.1
Sun, 15 Feb 1970 07:11:30 GMT