"Thu, 19 Feb 1970 07:12:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700219
Only TIME
07:12:37
General datetime
1970-02-19 07:12:37Z
For Database
1970-02-19 07:12:37
For HTTP1.1
Thu, 19 Feb 1970 07:12:37 GMT