"Sat, 03 Jan 1970 10:02:08"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
10:02:08
General datetime
1970-01-03 10:02:08Z
For Database
1970-01-03 10:02:08
For HTTP1.1
Sat, 03 Jan 1970 10:02:08 GMT