"Sat, 03 Jan 1970 10:03:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
10:03:51
General datetime
1970-01-03 10:03:51Z
For Database
1970-01-03 10:03:51
For HTTP1.1
Sat, 03 Jan 1970 10:03:51 GMT