"Sat, 03 Jan 1970 11:20:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
11:20:06
General datetime
1970-01-03 11:20:06Z
For Database
1970-01-03 11:20:06
For HTTP1.1
Sat, 03 Jan 1970 11:20:06 GMT