"Sat, 10 Jan 1970 12:03:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
12:03:13
General datetime
1970-01-10 12:03:13Z
For Database
1970-01-10 12:03:13
For HTTP1.1
Sat, 10 Jan 1970 12:03:13 GMT