"Sat, 03 Jan 1970 14:46:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
14:46:09
General datetime
1970-01-03 14:46:09Z
For Database
1970-01-03 14:46:09
For HTTP1.1
Sat, 03 Jan 1970 14:46:09 GMT