"Sat, 28 Feb 1970 00:53:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700228
Only TIME
00:53:39
General datetime
1970-02-28 00:53:39Z
For Database
1970-02-28 00:53:39
For HTTP1.1
Sat, 28 Feb 1970 00:53:39 GMT