"Sat, 10 Jan 1970 12:03:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
12:03:19
General datetime
1970-01-10 12:03:19Z
For Database
1970-01-10 12:03:19
For HTTP1.1
Sat, 10 Jan 1970 12:03:19 GMT