"Sat, 10 Jan 1970 12:34:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
12:34:38
General datetime
1970-01-10 12:34:38Z
For Database
1970-01-10 12:34:38
For HTTP1.1
Sat, 10 Jan 1970 12:34:38 GMT