"Tue, 20 Jan 1970 07:52:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700120
Only TIME
07:52:06
General datetime
1970-01-20 07:52:06Z
For Database
1970-01-20 07:52:06
For HTTP1.1
Tue, 20 Jan 1970 07:52:06 GMT