"Sat, 14 Mar 1970 12:03:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700314
Only TIME
12:03:03
General datetime
1970-03-14 12:03:03Z
For Database
1970-03-14 12:03:03
For HTTP1.1
Sat, 14 Mar 1970 12:03:03 GMT