"Sat, 31 Jan 1970 11:04:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
11:04:40
General datetime
1970-01-31 11:04:40Z
For Database
1970-01-31 11:04:40
For HTTP1.1
Sat, 31 Jan 1970 11:04:40 GMT