"Sat, 14 Mar 1970 12:02:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700314
Only TIME
12:02:30
General datetime
1970-03-14 12:02:30Z
For Database
1970-03-14 12:02:30
For HTTP1.1
Sat, 14 Mar 1970 12:02:30 GMT