"Sat, 31 Jan 1970 01:01:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
01:01:03
General datetime
1970-01-31 01:01:03Z
For Database
1970-01-31 01:01:03
For HTTP1.1
Sat, 31 Jan 1970 01:01:03 GMT