"Sat, 10 Jan 1970 19:45:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
19:45:03
General datetime
1970-01-10 19:45:03Z
For Database
1970-01-10 19:45:03
For HTTP1.1
Sat, 10 Jan 1970 19:45:03 GMT