"Sat, 03 Jan 1970 09:21:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
09:21:51
General datetime
1970-01-03 09:21:51Z
For Database
1970-01-03 09:21:51
For HTTP1.1
Sat, 03 Jan 1970 09:21:51 GMT