"Sat, 28 Feb 1970 07:11:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700228
Only TIME
07:11:47
General datetime
1970-02-28 07:11:47Z
For Database
1970-02-28 07:11:47
For HTTP1.1
Sat, 28 Feb 1970 07:11:47 GMT