"Tue, 20 Jan 1970 07:25:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700120
Only TIME
07:25:02
General datetime
1970-01-20 07:25:02Z
For Database
1970-01-20 07:25:02
For HTTP1.1
Tue, 20 Jan 1970 07:25:02 GMT