"Tue, 20 Jan 1970 07:24:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700120
Only TIME
07:24:52
General datetime
1970-01-20 07:24:52Z
For Database
1970-01-20 07:24:52
For HTTP1.1
Tue, 20 Jan 1970 07:24:52 GMT